Add histograms for network activity, and total/cumulative

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"
@@ skipping 85 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;
+  virtual void OnRequestWaitStateChange(const net::URLRequest& request,
+                                        RequestWaitState state) OVERRIDE;
 
   scoped_refptr<extensions::EventRouterForwarder> 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_;
 
   // Pointer to IOThread global, should outlive ChromeNetworkDelegate.
   chrome_browser_net::CacheStats* cache_stats_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeNetworkDelegate);
 };
 
 #endif  // CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_