Snap content to the top level window on chromeos

content/browser/renderer_host/render_widget_host_view_aura.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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 2570 matching lines @@
   else if (!overscroll_controller_)
     overscroll_controller_.reset(new OverscrollController());
 }
 
 void RenderWidgetHostViewAura::SnapToPhysicalPixelBoundary() {
   // The top left corner of our view in window coordinates might not land on a
   // device pixel boundary if we have a non-integer device scale. In that case,
   // to avoid the web contents area looking blurry we translate the web contents
   // in the +x, +y direction to land on the nearest pixel boundary. This may
   // cause the bottom and right edges to be clipped slightly, but that's ok.
+#if defined(OS_CHROMEOS)
+  aura::Window* snapped = window_->GetToplevelWindow();
+#else
   aura::Window* snapped = window_->GetRootWindow();
+#endif

[sadrul, 2016/06/09 02:57:04]

It may be OK to use GetToplevelWindow() on non-chromeos platforms too.

+
   if (snapped && snapped != window_)
     ui::SnapLayerToPhysicalPixelBoundary(snapped->layer(), window_->layer());
 
   has_snapped_to_boundary_ = true;
 }
 
 bool RenderWidgetHostViewAura::OnShowContextMenu(
     const ContextMenuParams& params) {
 #if defined(OS_WIN)
   last_context_menu_params_.reset();
@@ skipping 398 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content