From 6561311f4cb8275fc8dd85592840bb4a8e6ee6d3 Mon Sep 17 00:00:00 2001
From: jackhou <jackhou@chromium.org>
Date: Tue, 30 Sep 2014 19:34:15 -0700
Subject: [PATCH] [Win] Only update HWND styles on SizeConstraintsChanged for
 normal windows.

An earlier CL added SizeConstraintsChanged which updates the HWND's
style flags: https://codereview.chromium.org/581953002/

To be consistent with CalculateWindowStylesFromInitParams in
widget_hwnd_utils, it should only set the style on normal windows.

BUG=417986

Review URL: https://codereview.chromium.org/611223002

Cr-Commit-Position: refs/heads/master@{#297582}
---
 ui/views/win/hwnd_message_handler.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index 36003484d1670..ae24d047e5c7b 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -870,6 +870,10 @@ void HWNDMessageHandler::SetFullscreen(bool fullscreen) {
 
 void HWNDMessageHandler::SizeConstraintsChanged() {
   LONG style = GetWindowLong(hwnd(), GWL_STYLE);
+  // Ignore if this is not a standard window.
+  if (!(style & WS_OVERLAPPED))
+    return;
+
   if (delegate_->CanResize()) {
     style |= WS_THICKFRAME | WS_MAXIMIZEBOX;
     if (!delegate_->CanMaximize())