Adding DRP specfic UMA for FirstContentfulPaint

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index 71b5341f7cdcea14c8d1aa3349694835327e885b..39778ed598916bcfe9634168e8d956673e765637 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -6,30 +6,33 @@
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_
 
 #include "content/public/browser/navigation_handle.h"
 
 #include <stddef.h>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
+#include "base/supports_user_data.h"
 #include "content/browser/frame_host/frame_tree_node.h"
+#include "content/browser/frame_host/navigation_user_data.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_throttle.h"
 #include "url/gurl.h"
 
 struct FrameHostMsg_DidCommitProvisionalLoad_Params;
 
 namespace content {
 
+class NavigationUserData;
 class NavigatorDelegate;
 class ServiceWorkerContextWrapper;
 class ServiceWorkerNavigationHandle;
 struct NavigationRequestInfo;
 
 // This class keeps track of a single navigation. It is created upon receipt of
 // a DidStartProvisionalLoad IPC in a RenderFrameHost. The RenderFrameHost owns
 // the newly created NavigationHandleImpl as long as the navigation is ongoing.
 // The NavigationHandleImpl in the RenderFrameHost will be reset when the
 // navigation stops, that is if one of the following events happen:
@@ -207,20 +210,24 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
       RenderFrameHostImpl* render_frame_host,
       scoped_refptr<net::HttpResponseHeaders> response_headers);
 
   // Called when the navigation was committed in |render_frame_host|. This will
   // update the |state_|.
   void DidCommitNavigation(
       const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
       bool same_page,
       RenderFrameHostImpl* render_frame_host);
 
+  void SetNavigationSupportsUserData(
+      scoped_ptr<NavigationSupportsUserData> navigation_supports_user_data);
+  base::SupportsUserData::Data* GetUserData(const void* key) override;
+
  private:
   friend class NavigationHandleImplTest;
 
   // Used to track the state the navigation is currently in.
   enum State {
     INITIAL = 0,
     WILL_SEND_REQUEST,
     DEFERRING_START,
     WILL_REDIRECT_REQUEST,
     DEFERRING_REDIRECT,
@@ -288,16 +295,18 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   int pending_nav_entry_id_;
 
   // This callback will be run when all throttle checks have been performed.
   ThrottleChecksFinishedCallback complete_callback_;
 
   // PlzNavigate
   // Manages the lifetime of a pre-created ServiceWorkerProviderHost until a
   // corresponding ServiceWorkerNetworkProvider is created in the renderer.
   scoped_ptr<ServiceWorkerNavigationHandle> service_worker_handle_;
 
+  scoped_ptr<NavigationSupportsUserData> navigation_supports_user_data_;
+
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_