Collect tab timing information for use in telementry-based startup tests

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 6a0e7b151cb5e6fee577da30deb9772a35ec305c..b90932ce21cedf0299ee0185157b570c5a6ea102 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -107,6 +107,7 @@
 #include "content/renderer/renderer_webapplicationcachehost_impl.h"
 #include "content/renderer/renderer_webcolorchooser_impl.h"
 #include "content/renderer/speech_recognition_dispatcher.h"
+#include "content/renderer/stats_collection_extension.h"
 #include "content/renderer/text_input_client_observer.h"
 #include "content/renderer/v8_value_converter_impl.h"
 #include "content/renderer/web_ui_extension.h"
@@ -796,6 +797,8 @@ void RenderViewImpl::Initialize(RenderViewImplParams* params) {
 
   if (command_line.HasSwitch(switches::kDomAutomationController))
     enabled_bindings_ |= BINDINGS_POLICY_DOM_AUTOMATION;
+  if (command_line.HasSwitch(switches::kStatsCollectionExtension))
+    enabled_bindings_ |= BINDINGS_POLICY_STATS_COLLECTION;
 
   ProcessViewLayoutFlags(command_line);
 
@@ -3634,6 +3637,15 @@ void RenderViewImpl::didClearWindowObject(WebFrame* frame) {
                                                  "domAutomationController");
   }
 
+  if (enabled_bindings_ & BINDINGS_POLICY_STATS_COLLECTION) {
+    if (!stats_collection_extension_.get())
+      stats_collection_extension_.reset(new StatsCollectionExtension());
+    stats_collection_extension_->set_message_sender(
+        static_cast<RenderView*>(this));
+    stats_collection_extension_->BindToJavascript(frame,
+                                                 "statsCollectionExtension");
+  }
+
   InjectDoNotTrackBindings(frame);
 }