Adding histograms showing fraction of page load times

chrome/browser/net/chrome_network_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_NET_CHROME_NETWORK_DELEGATE_H_
 #define CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "net/base/network_delegate.h"
 
 class CookieSettings;
 class ExtensionEventRouterForwarder;
 class ExtensionInfoMap;
 class PrefService;
 template<class T> class PrefMember;
 
 typedef PrefMember<bool> BooleanPrefMember;
 
+namespace chrome_browser_net {
+class CacheStats;
+}
+
 namespace policy {
 class URLBlacklistManager;
 }
 
 // ChromeNetworkDelegate is the central point from within the chrome code to
 // add hooks into the network stack.
 class ChromeNetworkDelegate : public net::NetworkDelegate {
  public:
   // If |profile| is NULL, events will be broadcasted to all profiles,
   // otherwise they will only be sent to the specified profile.
   // |enable_referrers| should be initialized on the UI thread (see below)
   // beforehand. This object's owner is responsible for cleaning it up at
   // shutdown. If |cookie_settings| is NULL, all cookies are enabled,
   // otherwise, the settings are enforced on all observed network requests.
   ChromeNetworkDelegate(
       ExtensionEventRouterForwarder* event_router,
       ExtensionInfoMap* extension_info_map,
       const policy::URLBlacklistManager* url_blacklist_manager,
       void* profile,
       CookieSettings* cookie_settings,
-      BooleanPrefMember* enable_referrers);
+      BooleanPrefMember* enable_referrers,
+      chrome_browser_net::CacheStats* cache_stats);
   virtual ~ChromeNetworkDelegate();
 
   // Causes |OnCanThrottleRequest| to never return true.
   void NeverThrottleRequests();
 
   // Binds |enable_referrers| to |pref_service| and moves it to the IO thread.
   // This method should be called on the UI thread.
   static void InitializeReferrersEnabled(BooleanPrefMember* enable_referrers,
                                          PrefService* pref_service);
 
@@ skipping 36 matching lines @@
   virtual bool OnCanSetCookie(const net::URLRequest& request,
                               const std::string& cookie_line,
                               net::CookieOptions* options) OVERRIDE;
   virtual bool OnCanAccessFile(const net::URLRequest& request,
                                const FilePath& path) const OVERRIDE;
   virtual bool OnCanThrottleRequest(
       const net::URLRequest& request) const OVERRIDE;
   virtual int OnBeforeSocketStreamConnect(
       net::SocketStream* stream,
       const net::CompletionCallback& callback) OVERRIDE;
+  virtual void OnCacheWaitStateChange(const net::URLRequest& request,
+                                      CacheWaitState state) OVERRIDE;
 
   scoped_refptr<ExtensionEventRouterForwarder> event_router_;
   void* profile_;
   scoped_refptr<CookieSettings> cookie_settings_;
 
   scoped_refptr<ExtensionInfoMap> extension_info_map_;
 
   // Weak, owned by our owner.
   BooleanPrefMember* enable_referrers_;
 
   // True if OnCanThrottleRequest should always return false.
   bool never_throttle_requests_;
 
   // Weak, owned by our owner.
   const policy::URLBlacklistManager* url_blacklist_manager_;
 
   // When true, allow access to all file:// URLs.
   static bool g_allow_file_access_;
 
+  chrome_browser_net::CacheStats* cache_stats_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeNetworkDelegate);
 };
 
 #endif  // CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_