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 cb1617089fcb17540889d18044298327e336b2fa..42cdb38593088f1bd3a10903ff20353606643030 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -29,6 +29,7 @@
 #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"
@@ -437,6 +438,8 @@ 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()
 
@@ -1220,4 +1223,10 @@ void RenderMessageFilter::OnWebAudioMediaCodec(
 }
 #endif
 
+void RenderMessageFilter::OnSetHasPendingTransitionRequest(int render_frame_id,
+                                                           bool is_transition) {
+  TransitionRequestManager::GetInstance()->SetHasPendingTransitionRequest(
+      render_process_id_, render_frame_id, is_transition);
+}
+
 }  // namespace content