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

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index 0a95825d377ef661e08741cce3484062ee154631..f50141939e54cc48c9cc7a4483f0961afa57e287 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -41,6 +41,7 @@
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_view_host_delegate_view.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
+#include "content/browser/transition_request_manager.h"
 #include "content/common/accessibility_messages.h"
 #include "content/common/browser_plugin/browser_plugin_messages.h"
 #include "content/common/content_switches_internal.h"
@@ -246,6 +247,8 @@ RenderViewHostImpl::~RenderViewHostImpl() {
   CrossSiteRequestManager::GetInstance()->SetHasPendingCrossSiteRequest(
       GetProcess()->GetID(), GetRoutingID(), false);
 
+  SetHasPendingTransitionRequest(false);
+
   // If this was swapped out, it already decremented the active view
   // count of the SiteInstance it belongs to.
   if (IsRVHStateActive(rvh_state_))
@@ -659,6 +662,12 @@ void RenderViewHostImpl::SetHasPendingCrossSiteRequest(
       GetProcess()->GetID(), GetRoutingID(), has_pending_request);
 }
 
+void RenderViewHostImpl::SetHasPendingTransitionRequest(
+    bool has_pending_request) {
+  TransitionRequestManager::GetInstance()->SetHasPendingTransitionRequest(
+      GetProcess()->GetID(), GetRoutingID(), has_pending_request);
+}
+
 void RenderViewHostImpl::SetWebUIHandle(mojo::ScopedMessagePipeHandle handle) {
   // Never grant any bindings to browser plugin guests.
   if (GetProcess()->IsGuest()) {