Navigation transitions: Block first response until after transitions have run.

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index 03d8b40e4b14430fd6733c15c30bf3e78c833691..ca13d1231081d7770942588a58b0a4dd74e17cae 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -30,6 +30,7 @@
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
+#include "content/browser/transition_request_manager.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/child_process_messages.h"
 #include "content/common/cookie_data.h"
@@ -467,6 +468,8 @@ bool RenderMessageFilter::OnMessageReceived(const IPC::Message& message) {
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RunWebAudioMediaCodec, OnWebAudioMediaCodec)
 #endif
+    IPC_MESSAGE_HANDLER(FrameHostMsg_SetHasPendingTransitionRequest,
+                        OnSetHasPendingTransitionRequest)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -1338,4 +1341,10 @@ void RenderMessageFilter::GpuMemoryBufferAllocated(
   Send(reply);
 }
 
+void RenderMessageFilter::OnSetHasPendingTransitionRequest(int frame_id,
+                                                           bool is_transition) {
+  TransitionRequestManager::GetInstance()->SetHasPendingTransitionRequest(
+      render_process_id_, frame_id, is_transition);
+}
+
 }  // namespace content