Restore resize throttling on Chrome OS

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index b02b325a545b87df62f5fe6674795eeb918e2de8..79a6e8f9835992aae7a15f26ca8358ebfe50833d 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -778,12 +778,9 @@ void RenderWidgetHostViewAura::SetBackgroundOpaque(bool opaque) {
 }
 
 gfx::Size RenderWidgetHostViewAura::GetVisibleViewportSize() const {
-  gfx::Rect window_bounds = window_->bounds();
-  int viewport_width = std::max(
-      0, window_bounds.width() - insets_.left() - insets_.right());
-  int viewport_height = std::max(
-      0, window_bounds.height() - insets_.top() - insets_.bottom());
-  return gfx::Size(viewport_width, viewport_height);
+  gfx::Rect requested_rect(GetRequestedRendererSize());
+  requested_rect.Inset(insets_);
+  return requested_rect.size();
 }
 
 void RenderWidgetHostViewAura::SetInsets(const gfx::Insets& insets) {
@@ -895,6 +892,10 @@ void RenderWidgetHostViewAura::SelectionChanged(const base::string16& text,
 #endif  // defined(USE_X11) && !defined(OS_CHROMEOS)
 }
 
+gfx::Size RenderWidgetHostViewAura::GetRequestedRendererSize() const {
+  return delegated_frame_host_->GetRequestedRendererSize();
+}
+
 void RenderWidgetHostViewAura::SelectionBoundsChanged(
     const ViewHostMsg_SelectionBounds_Params& params) {
   if (selection_anchor_rect_ == params.anchor_rect &&