Fix BrowserFrameWin artifact on opaque to glass frame changes.

chrome/browser/ui/views/frame/browser_frame_win.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/views/frame/browser_frame_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 #include <set>
 
@@ skipping 159 matching lines @@
   // client edge over part of the default frame.
   if (IsFullscreen())
     border_thickness = 0;
   else if (!IsMaximized())
     border_thickness -= kClientEdgeThickness;
   insets->Set(0, border_thickness, border_thickness, border_thickness);
   return true;
 }
 
 void BrowserFrameWin::HandleFrameChanged() {
-  // We need to update the glass region on or off before the base class adjusts
-  // the window region.
+  // Handle window frame layout changes, then set the updated glass region.
+  NativeWidgetWin::HandleFrameChanged();
   UpdateDWMFrame();
-  NativeWidgetWin::HandleFrameChanged();
 }
 
 bool BrowserFrameWin::PreHandleMSG(UINT message,
                                    WPARAM w_param,
                                    LPARAM l_param,
                                    LRESULT* result) {
   static const UINT metro_navigation_search_message =
       RegisterWindowMessage(chrome::kMetroNavigationAndSearchMessage);
 
   static const UINT metro_get_current_tab_info_message =
@@ skipping 254 matching lines @@
     // because the GDI-drawn text in the web content composited over it will
     // become semi-transparent over any glass area.
     if (!IsMaximized() && !IsFullscreen()) {
       margins.cxLeftWidth = kClientEdgeThickness + 1;
       margins.cxRightWidth = kClientEdgeThickness + 1;
       margins.cyBottomHeight = kClientEdgeThickness + 1;
       margins.cyTopHeight = kClientEdgeThickness + 1;
     }
     // In maximized mode, we only have a titlebar strip of glass, no side/bottom
     // borders.
-    if (!browser_view_->IsFullscreen()) {
+    if (!IsFullscreen()) {
       gfx::Rect tabstrip_bounds(
           browser_frame_->GetBoundsForTabStrip(browser_view_->tabstrip()));
       margins.cyTopHeight = tabstrip_bounds.bottom() + kDWMFrameTopOffset;
     }
   }
 
   DwmExtendFrameIntoClientArea(GetNativeView(), &margins);
 }
 
 void BrowserFrameWin::BuildSystemMenuForBrowserWindow() {
@@ skipping 146 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeBrowserFrame, public:
 
 // static
 NativeBrowserFrame* NativeBrowserFrame::CreateNativeBrowserFrame(
     BrowserFrame* browser_frame,
     BrowserView* browser_view) {
   return new BrowserFrameWin(browser_frame, browser_view);
 }