If the renderer drops a navigation, make sure the spinner doesn't spin endlessly.

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 0b8b72b7a7884d3a220e595ecb4358e571c52e42..d5eb2114fe7d16fb12753600e77bc3ba524d87b6 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -578,6 +578,9 @@ IPC_MESSAGE_ROUTED3(FrameHostMsg_DidFailLoadWithError,
                     int /* error_code */,
                     base::string16 /* error_description */)
 
+// Sent when the renderer drops a navigation.

[Charlie Reis, 2014/12/09 19:28:15]

nit: drops a navigation -> decides to ignore a navigation request.

(Just wanted to elaborate a bit in case someone didn't understand the name of
the message.)

[Avi (use Gerrit), 2014/12/09 20:45:27]

Done.

+IPC_MESSAGE_ROUTED0(FrameHostMsg_DidDropNavigation)
+
 // Sent when the renderer starts loading the page. |to_different_document| will
 // be true unless the load is a fragment navigation, or triggered by
 // history.pushState/replaceState.