Add support for interstitial pages on android.

content/browser/web_contents/interstitial_page_impl.h

Index: content/browser/web_contents/interstitial_page_impl.h
diff --git a/content/browser/web_contents/interstitial_page_impl.h b/content/browser/web_contents/interstitial_page_impl.h
index dba542760076eac97128369fc656c3817bbfe7ce..e1ebbf585f464b27bd359aede3e754bbcc0071a5 100644
--- a/content/browser/web_contents/interstitial_page_impl.h
+++ b/content/browser/web_contents/interstitial_page_impl.h
@@ -74,6 +74,12 @@ class CONTENT_EXPORT InterstitialPageImpl
   }
   bool reload_on_dont_proceed() const { return reload_on_dont_proceed_; }
 
+#if defined(OS_ANDROID)
+  // Android shares a single platform window for all tabs, so we need to expose
+  // the RenderViewHost to properly route gestures to the interstitial.
+  RenderViewHost* GetRenderViewHost() const;
+#endif
+
  protected:
   // NotificationObserver method:
   virtual void Observe(int type,
@@ -115,6 +121,11 @@ class CONTENT_EXPORT InterstitialPageImpl
       const ContextMenuParams& params,
       ContextMenuSourceType type) OVERRIDE;
 
+#if defined(OS_ANDROID)
+  virtual void AttachLayer(WebKit::WebLayer* layer) OVERRIDE;
+  virtual void RemoveLayer(WebKit::WebLayer* layer) OVERRIDE;
+#endif
+
   // RenderWidgetHostDelegate implementation:
   virtual void RenderWidgetDeleted(
       RenderWidgetHostImpl* render_widget_host) OVERRIDE;