Fix JavaScript alerts from frames with oopif on, after a cross-process click.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index f572f3e938b981876a6175c1fa4ef9783d96ca1b..112477eb49751e2fc488b2599caaf77e9dd85e43 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -801,6 +801,7 @@ class CONTENT_EXPORT RenderFrameImpl
               const blink::WebFindOptions& options);
   void OnStopFinding(StopFindAction action);
   void OnEnableViewSourceMode();
+  void OnSuppressFurtherDialogs();
 #if defined(OS_ANDROID)
   void OnActivateNearestFindResult(int request_id, float x, float y);
   void OnFindMatchRects(int current_version);
@@ -1207,6 +1208,11 @@ class CONTENT_EXPORT RenderFrameImpl
   // Whether or not this RenderFrame is currently pasting.
   bool is_pasting_;
 
+  // Whether we must stop creating nested message loops for modal dialogs. This
+  // is necessary because modal dialogs have a ScopedPageLoadDeferrer on the
+  // stack that interferes with swapping out.
+  bool suppress_further_dialogs_;
+
 #if defined(ENABLE_WEBVR)
   // The VR dispatcher attached to the frame, lazily initialized.
   scoped_ptr<VRDispatcher> vr_dispatcher_;