Fix page zoom to be frame-centric for out-of-process frames.

content/browser/frame_host/cross_process_frame_connector.cc

Index: content/browser/frame_host/cross_process_frame_connector.cc
diff --git a/content/browser/frame_host/cross_process_frame_connector.cc b/content/browser/frame_host/cross_process_frame_connector.cc
index 1d2234570626fbc65fa2705d02cb4d5a6ac17e96..bb12f90fec4604afbf485d8bc66da9bb140599a1 100644
--- a/content/browser/frame_host/cross_process_frame_connector.cc
+++ b/content/browser/frame_host/cross_process_frame_connector.cc
@@ -195,6 +195,10 @@ void CrossProcessFrameConnector::OnForwardInputEvent(
 
 void CrossProcessFrameConnector::OnFrameRectChanged(
     const gfx::Rect& frame_rect) {
+  // TODO(wjmaclean) When changing the zoom of a WebView child without also
+  // changing the zoom of the embedder (e.g. using WebView.setZoom()), we
+  // shouldn't propagate this change in the frame rect. We need to find a way
+  // to detect when this happens. http://crbug.com/607978
   if (!frame_rect.size().IsEmpty())
     SetRect(frame_rect);
 }