Fix RenderWidgetHostViewGuest leak.

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index c64ef6e036e7d762930b0b25436b2a03ef21186a..202ff7460d765d5253c2f4a8e53719fb852d8556 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -132,7 +132,12 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
     touch_editing_client_ = client;
   }
 
-  explicit RenderWidgetHostViewAura(RenderWidgetHost* host);
+  // When |is_guest_view_hack| is true, this view isn't really the view for
+  // the |widget|, a RenderWidgetHostViewGuest is.
+  //
+  // TODO(lazyboy): Remove |is_guest_view_hack| once BrowserPlugin has migrated
+  // to use RWHVChildFrame (http://crbug.com/330264).
+  RenderWidgetHostViewAura(RenderWidgetHost* host, bool is_guest_view_hack);
 
   // RenderWidgetHostView implementation.
   virtual void InitAsChild(gfx::NativeView parent_view) override;
@@ -617,6 +622,10 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
 
   scoped_ptr<aura::client::ScopedTooltipDisabler> tooltip_disabler_;
 
+  // True when this view acts as a platform view hack for a
+  // RenderWidgetHostViewGuest.
+  bool is_guest_view_hack_;
+
   base::WeakPtrFactory<RenderWidgetHostViewAura> weak_ptr_factory_;
 
   gfx::Rect disambiguation_target_rect_;