webapps: update recents and status bar color sooner

Currently there is a delay until the native library is loaded for the data
to be updated. There is no reason for this to happen as we have all the
infomation to do so and the native library is not needed to update recents
or the status bar.

Change this so that these items are updated earlier in the initialization
cycle. Moreover, remove an old TODO.

BUG=510402
[email protected]

Review URL: https://codereview.chromium.org/1313063002

Cr-Commit-Position: refs/heads/master@{#345664}
(cherry picked from commit 20e720c)

Review URL: https://codereview.chromium.org/1320863002 .

Cr-Commit-Position: refs/branch-heads/2490@{#45}
Cr-Branched-From: 7790a35-refs/heads/master@{#344925}

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappActivity.java

@@ -105,6 +105,9 @@ private void initializeUI(Bundle savedInstanceState) {
     public void preInflationStartup() {
         WebappInfo info = WebappInfo.create(getIntent());
         if (info != null) mWebappInfo.copy(info);
+
+        updateTaskDescription();
+
         mCleanupTask = new WebappDirectoryManager(getActivityDirectory(),
                 WEBAPP_SCHEME, FeatureUtilities.isDocumentModeEligible(this));
 
@@ -289,14 +292,19 @@ public void onFaviconUpdated(Tab tab) {
     }
 
     private void updateTaskDescription() {
-        // TODO(lalitm): this is actually a temporary fix for the bigger issue of short
-        // name not being set to the meta tag title of the website if the short name
-        // is not present in the manifest. Some discussion is required for this before
-        // a CL which correctly fixes the issue is submitted.
-        String title = TextUtils.isEmpty(mWebappInfo.shortName())
-                ? getActivityTab().getTitle() : mWebappInfo.shortName();
-        Bitmap icon = mWebappInfo.icon() == null
-                ? getActivityTab().getFavicon() : mWebappInfo.icon();
+        String title = null;
+        if (!TextUtils.isEmpty(mWebappInfo.shortName())) {
+            title = mWebappInfo.shortName();
+        } else if (getActivityTab() != null) {
+            title = getActivityTab().getTitle();
+        }
+
+        Bitmap icon = null;
+        if (mWebappInfo.icon() != null) {
+            icon = mWebappInfo.icon();
+        } else if (getActivityTab() != null) {
+            icon = getActivityTab().getFavicon();
+        }
 
         if (mBrandColor == null
                 && mWebappInfo.themeColor() != ShortcutHelper.MANIFEST_COLOR_INVALID_OR_MISSING