Adding DRP specfic UMA for FirstContentfulPaint

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_CHROME_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
 #define CHROME_BROWSER_RENDERER_HOST_CHROME_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
 
 #include <map>
+#include <memory>
 #include <set>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/external_protocol/external_protocol_handler.h"
 #include "content/public/browser/resource_dispatcher_host_delegate.h"
 
 class DelayedResourceQueue;
 class DownloadRequestLimiter;
 
 namespace extensions {
 class UserScriptListener;
 }
 
 namespace safe_browsing {
 class SafeBrowsingService;
 }
 
+namespace content {
+class NavigationData;
+}
+
 // Implements ResourceDispatcherHostDelegate. Currently used by the Prerender
 // system to abort requests and add to the load flags when a request begins.
 class ChromeResourceDispatcherHostDelegate
     : public content::ResourceDispatcherHostDelegate {
  public:
   ChromeResourceDispatcherHostDelegate();
   ~ChromeResourceDispatcherHostDelegate() override;
 
   // ResourceDispatcherHostDelegate implementation.
   bool ShouldBeginRequest(const std::string& method,
@@ skipping 46 matching lines @@
   void RequestComplete(net::URLRequest* url_request) override;
   bool ShouldEnableLoFiMode(
       const net::URLRequest& url_request,
       content::ResourceContext* resource_context) override;
 
   // Called on the UI thread. Allows switching out the
   // ExternalProtocolHandler::Delegate for testing code.
   static void SetExternalProtocolHandlerDelegateForTesting(
       ExternalProtocolHandler::Delegate* delegate);
 
+  std::unique_ptr<content::NavigationData> GetNavigationData(

[nasko, 2016/04/26 20:18:39]

Keep the ordering the same as the inherited interface - this needs to move right
after ShouldEnableLoFiMode with no empty line between them.

[RyanSturm, 2016/04/27 23:27:46]

Done.

+      net::URLRequest* request) const override;
+
  private:
 #if defined(ENABLE_EXTENSIONS)
   struct StreamTargetInfo {
     std::string extension_id;
     std::string view_id;
   };
 #endif
 
   void AppendStandardResourceThrottles(
       net::URLRequest* request,
       content::ResourceContext* resource_context,
       content::ResourceType resource_type,
       ScopedVector<content::ResourceThrottle>* throttles);
 
   scoped_refptr<DownloadRequestLimiter> download_request_limiter_;
   scoped_refptr<safe_browsing::SafeBrowsingService> safe_browsing_;
 #if defined(ENABLE_EXTENSIONS)
   scoped_refptr<extensions::UserScriptListener> user_script_listener_;
   std::map<net::URLRequest*, StreamTargetInfo> stream_target_info_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ChromeResourceDispatcherHostDelegate);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_CHROME_RESOURCE_DISPATCHER_HOST_DELEGATE_H_