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 <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 net {
+class HostPortPair;
+}
+
 // 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 41 matching lines @@
                          IPC::Sender* sender) override;
   void OnRequestRedirected(const GURL& redirect_url,
                            net::URLRequest* request,
                            content::ResourceContext* resource_context,
                            content::ResourceResponse* response) override;
   void RequestComplete(net::URLRequest* url_request) override;
   bool ShouldEnableLoFiMode(
       const net::URLRequest& url_request,
       content::ResourceContext* resource_context) override;
 
+  bool WasFetchedViaDataReductionProxy(
+      const net::HostPortPair& proxy_server,
+      content::ResourceContext* resource_context) override;

[bengr, 2016/02/26 22:53:57]

You should probably forward declare this.

[RyanSturm, 2016/03/01 19:36:04]

Done.

+
   // Called on the UI thread. Allows switching out the
   // ExternalProtocolHandler::Delegate for testing code.
   static void SetExternalProtocolHandlerDelegateForTesting(
       ExternalProtocolHandler::Delegate* delegate);
 
  private:
 #if defined(ENABLE_EXTENSIONS)
   struct StreamTargetInfo {
     std::string extension_id;
     std::string view_id;
@@ skipping 10 matching lines @@
   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_