Add stats collection for telemetry startup.warm.blank_page test.

mojo/services/tracing/tracing_app.h

Index: mojo/services/tracing/tracing_app.h
diff --git a/mojo/services/tracing/tracing_app.h b/mojo/services/tracing/tracing_app.h
index f652c29c96181e5e5b75a20e12f401a30d16f180..23a1f5cef956b252d8ebf4a395a8b636069b60a1 100644
--- a/mojo/services/tracing/tracing_app.h
+++ b/mojo/services/tracing/tracing_app.h
@@ -20,7 +20,9 @@ class TraceDataSink;
 
 class TracingApp : public mojo::ApplicationDelegate,
                    public mojo::InterfaceFactory<TraceCoordinator>,
-                   public TraceCoordinator {
+                   public TraceCoordinator,
+                   public mojo::InterfaceFactory<StartupPerformanceController>,
+                   public StartupPerformanceController {
  public:
   TracingApp();
   ~TracingApp() override;
@@ -34,17 +36,35 @@ class TracingApp : public mojo::ApplicationDelegate,
   void Create(mojo::ApplicationConnection* connection,
               mojo::InterfaceRequest<TraceCoordinator> request) override;
 
+  // mojo::InterfaceFactory<StartupPerformanceController> implementation.
+  void Create(
+      mojo::ApplicationConnection* connection,
+      mojo::InterfaceRequest<StartupPerformanceController> request) override;
+
   // tracing::TraceCoordinator implementation.
   void Start(mojo::ScopedDataPipeProducerHandle stream,
              const mojo::String& categories) override;
   void StopAndFlush() override;
 
+  // tracing::StartupPerformanceController implementation.
+  void SetShellProcessCreationTime(int64 time) override;
+  void SetBrowserMessageLoopStartTime(int64 time) override;
+  void SetBrowserWindowDisplayTime(int64 time) override;
+  void SetBrowserOpenTabsTime(int64 time) override;
+  void SetFirstWebContentsMainFrameLoadTime(int64 time) override;
+  void SetFirstVisuallyNonEmptyLayoutTime(int64 time) override;
+  void GetStartupPerformanceTimes(
+      const GetStartupPerformanceTimesCallback& callback) override;
+
   void AllDataCollected();
 
   scoped_ptr<TraceDataSink> sink_;
   ScopedVector<CollectorImpl> collector_impls_;
   mojo::WeakInterfacePtrSet<TraceController> controller_ptrs_;
   mojo::WeakBindingSet<TraceCoordinator> coordinator_bindings_;
+  mojo::WeakBindingSet<StartupPerformanceController>
+      startup_performance_controller_bindings_;
+  StartupPerformanceTimes startup_performance_times_;
 
   DISALLOW_COPY_AND_ASSIGN(TracingApp);
 };