Add initial feature/UI customisations for profiling builds

config/gni/devtools_grd_files.gni

@@ -842,6 +842,7 @@ grd_files_debug_sources = [
   "front_end/entrypoints/node_app/NodeConnectionsPanel.js",
   "front_end/entrypoints/node_app/NodeMain.js",
   "front_end/entrypoints/node_app/nodeConnectionsPanel.css.js",
+  "front_end/entrypoints/rn_fusebox/FuseboxProfilingBuildObserver.js",
   "front_end/entrypoints/shell/browser_compatibility_guard.js",
   "front_end/entrypoints/wasmparser_worker/WasmParserWorker.js",
   "front_end/entrypoints/worker_app/WorkerMain.js",

front_end/entrypoints/rn_fusebox/BUILD.gn

@@ -2,9 +2,25 @@
 # Copyright 2021 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
 import("../../../scripts/build/ninja/devtools_entrypoint.gni")
+import("../../../scripts/build/ninja/devtools_module.gni")
 import("../visibility.gni")
 
+devtools_module("rn_fusebox") {
+  sources = [
+    "FuseboxProfilingBuildObserver.ts",
+  ]
+
+  deps = [
+    "../../core/common:bundle",
+    "../../core/i18n:bundle",
+    "../../core/root:bundle",
+    "../../core/sdk:bundle",
+    "../../ui/legacy:bundle",
+  ]
+}
+
 devtools_entrypoint("entrypoint") {
   entrypoint = "rn_fusebox.ts"
 
@@ -39,6 +55,7 @@ devtools_entrypoint("entrypoint") {
     "../../panels/webauthn:meta",
     "../main:bundle",
     "../shell",
+    ":rn_fusebox",
   ]
 
   visibility = [ "../../:*" ]

front_end/entrypoints/rn_fusebox/FuseboxProfilingBuildObserver.ts

@@ -0,0 +1,89 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+// Copyright 2024 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import * as Common from '../../core/common/common.js';
+import * as Protocol from '../../generated/protocol.js';
+import * as Root from '../../core/root/root.js';
+import * as SDK from '../../core/sdk/sdk.js';
+import * as UI from '../../ui/legacy/legacy.js';
+import * as i18n from '../../core/i18n/i18n.js';
+
+const UIStrings = {
+  /**
+   * @description Message for the "settings changed" banner shown when a reload is required.
+   */
+  reloadRequiredMessage: '[Profiling build first run] One or more settings have changed. Please reload to access the Performance panel.',
+};
+
+const str_ = i18n.i18n.registerUIStrings('entrypoints/rn_fusebox/FuseboxProfilingBuildModeObserver.ts', UIStrings);
+const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);
+
+/**
+ * [Experimental] Model observer which configures available DevTools features
+ * when a profiling build is identified.
+ */
+export default class FuseboxProfilingBuildObserver implements
+    SDK.TargetManager.SDKModelObserver<SDK.ReactNativeApplicationModel.ReactNativeApplicationModel> {
+  constructor(targetManager: SDK.TargetManager.TargetManager) {
+    targetManager.observeModels(SDK.ReactNativeApplicationModel.ReactNativeApplicationModel, this);
+  }
+
+  modelAdded(model: SDK.ReactNativeApplicationModel.ReactNativeApplicationModel): void {
+    model.ensureEnabled();
+    model.addEventListener(SDK.ReactNativeApplicationModel.Events.MetadataUpdated, this.#handleMetadataUpdated, this);
+  }
+
+  modelRemoved(model: SDK.ReactNativeApplicationModel.ReactNativeApplicationModel): void {
+    model.removeEventListener(
+        SDK.ReactNativeApplicationModel.Events.MetadataUpdated, this.#handleMetadataUpdated, this);
+  }
+
+  #handleMetadataUpdated(
+      event: Common.EventTarget.EventTargetEvent<Protocol.ReactNativeApplication.MetadataUpdatedEvent>): void {
+    const {unstable_isProfilingBuild} = event.data;
+
+    if (unstable_isProfilingBuild) {
+      this.#hideUnsupportedFeatures();
+      this.#ensurePerformancePanelEnabled();
+    }
+  }
+
+  #hideUnsupportedFeatures(): void {
+    UI.ViewManager.ViewManager.instance()
+      .resolveLocation(UI.ViewManager.ViewLocationValues.PANEL)
+      .then(location => {
+        UI.ViewManager.getRegisteredViewExtensions().forEach(view => {
+          switch (view.viewId()) {
+            case 'sources':
+            case 'network':
+            case 'react-devtools-components':
+            case 'react-devtools-profiler':
+              location?.removeView(view);
+              break;
+          }
+        });
+      });
+  }
+
+  #ensurePerformancePanelEnabled(): void {
+    if (
+      !Root.Runtime.experiments.isEnabled(
+        Root.Runtime.ExperimentName.ENABLE_PERFORMANCE_PANEL,
+      )
+    ) {
+      Root.Runtime.experiments.setEnabled(
+        Root.Runtime.ExperimentName.ENABLE_PERFORMANCE_PANEL,
+        true,
+      );
+
+      const inspectorView = UI.InspectorView?.InspectorView?.instance();
+      if (inspectorView) {
+        inspectorView.displayReloadRequiredWarning(
+          i18nString(UIStrings.reloadRequiredMessage),
+        );
+      }
+    }
+  }
+}

front_end/entrypoints/rn_fusebox/rn_fusebox.ts

@@ -28,6 +28,7 @@ import * as Protocol from '../../generated/protocol.js';
 import type * as Platform from '../../core/platform/platform.js';
 import type * as Sources from '../../panels/sources/sources.js';
 import * as RNExperiments from '../../core/rn_experiments/rn_experiments.js';
+import FuseboxProfilingBuildObserver from './FuseboxProfilingBuildObserver.js';
 
 /*
  * To ensure accurate timing measurements,
@@ -275,5 +276,6 @@ class FuseboxReactNativeApplicationObserver implements
 }
 
 new FuseboxReactNativeApplicationObserver(SDK.TargetManager.TargetManager.instance());
+new FuseboxProfilingBuildObserver(SDK.TargetManager.TargetManager.instance());
 
 Host.rnPerfMetrics.entryPointLoadingFinished('rn_fusebox');

front_end/generated/protocol.ts

@@ -60,6 +60,10 @@ export namespace ReactNativeApplication {
      * The React Native version.
      */
     reactNativeVersion?: string;
+    /**
+     * Whether the app is a profiling build.
+     */
+    unstable_isProfilingBuild?: boolean;
   }
 }
 

front_end/panels/timeline/TimelinePanel.ts

@@ -261,6 +261,7 @@ const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);
 
 let timelinePanelInstance: TimelinePanel;
 let isNode: boolean;
+let isReactNative: boolean;
 
 export class TimelinePanel extends UI.Panel.Panel implements Client, TimelineModeViewDelegate {
   private readonly dropTarget: UI.DropTarget.DropTarget;
@@ -364,7 +365,7 @@ export class TimelinePanel extends UI.Panel.Panel implements Client, TimelineMod
     this.captureLayersAndPicturesSetting.setTitle(i18nString(UIStrings.enableAdvancedPaint));
 
     this.showScreenshotsSetting =
-        Common.Settings.Settings.instance().createSetting('timeline-show-screenshots', isNode ? false : true);
+        Common.Settings.Settings.instance().createSetting('timeline-show-screenshots', isNode || isReactNative ? false : true);
     this.showScreenshotsSetting.setTitle(i18nString(UIStrings.screenshots));
     this.showScreenshotsSetting.addChangeListener(this.updateOverviewControls, this);
 
@@ -377,7 +378,7 @@ export class TimelinePanel extends UI.Panel.Panel implements Client, TimelineMod
     this.panelToolbar = new UI.Toolbar.Toolbar('timeline-main-toolbar', timelineToolbarContainer);
     this.panelToolbar.makeWrappable(true);
     this.panelRightToolbar = new UI.Toolbar.Toolbar('', timelineToolbarContainer);
-    if (!isNode) {
+    if (!isNode && !isReactNative) {
       this.createSettingsPane();
       this.updateShowSettingsToolbarButton();
     }
@@ -454,6 +455,11 @@ export class TimelinePanel extends UI.Panel.Panel implements Client, TimelineMod
     const {forceNew, isNode: isNodeMode} = opts;
     isNode = isNodeMode;
 
+    // [RN] Used to scope down available features for React Native targets
+    isReactNative = Root.Runtime.experiments.isEnabled(
+      Root.Runtime.ExperimentName.REACT_NATIVE_SPECIFIC_UI,
+    );
+
     if (!timelinePanelInstance || forceNew) {
       timelinePanelInstance = new TimelinePanel();
     }
@@ -560,7 +566,7 @@ export class TimelinePanel extends UI.Panel.Panel implements Client, TimelineMod
 
     // View
     this.panelToolbar.appendSeparator();
-    if (!isNode) {
+    if (!isNode && !isReactNative) {
       this.showScreenshotsToolbarCheckbox =
           this.createSettingCheckbox(this.showScreenshotsSetting, i18nString(UIStrings.captureScreenshots));
       this.panelToolbar.appendToolbarItem(this.showScreenshotsToolbarCheckbox);
@@ -581,7 +587,7 @@ export class TimelinePanel extends UI.Panel.Panel implements Client, TimelineMod
     }
 
     // Settings
-    if (!isNode) {
+    if (!isNode && !isReactNative) {
       this.panelRightToolbar.appendSeparator();
       this.panelRightToolbar.appendToolbarItem(this.showSettingsPaneButton);
     }
@@ -801,7 +807,7 @@ export class TimelinePanel extends UI.Panel.Panel implements Client, TimelineMod
   }
 
   private updateSettingsPaneVisibility(): void {
-    if (isNode) {
+    if (isNode || isReactNative) {
       return;
     }
     if (this.showSettingsPaneSetting.get()) {

third_party/blink/public/devtools_protocol/browser_protocol.json

@@ -68,6 +68,12 @@
                             "description": "The React Native version.",
                             "optional": true,
                             "type": "string"
+                        },
+                        {
+                            "name": "unstable_isProfilingBuild",
+                            "description": "Whether the app is a profiling build.",
+                            "optional": true,
+                            "type": "boolean"
                         }
                     ]
                 }
@@ -29262,4 +29268,4 @@
             ]
         }
     ]
-}
+}

third_party/blink/public/devtools_protocol/react_native_domains.pdl

@@ -37,3 +37,5 @@ experimental domain ReactNativeApplication
       optional string platform
       # The React Native version.
       optional string reactNativeVersion
+      # Whether the app is a profiling build.
+      optional boolean unstable_isProfilingBuild