Devtools: UMA for InspectElement loading time was added

chrome/browser/devtools/devtools_window.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_DEVTOOLS_DEVTOOLS_WINDOW_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_WINDOW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 280 matching lines @@
 
   // content::DevToolsFrontendHostDelegate override:
   virtual void DispatchOnEmbedder(const std::string& message) OVERRIDE;
 
   // DevToolsEmbedderMessageDispatcher::Delegate overrides:
   virtual void ActivateWindow() OVERRIDE;
   virtual void ActivateContents(content::WebContents* contents) OVERRIDE;
   virtual void CloseWindow() OVERRIDE;
   virtual void SetContentsInsets(
       int left, int top, int right, int bottom) OVERRIDE;
+  virtual void InspectElementLoadingCompleted() OVERRIDE;
   virtual void MoveWindow(int x, int y) OVERRIDE;
   virtual void SetIsDocked(bool is_docked) OVERRIDE;
   virtual void OpenInNewTab(const std::string& url) OVERRIDE;
   virtual void SaveToFile(const std::string& url,
                           const std::string& content,
                           bool save_as) OVERRIDE;
   virtual void AppendToFile(const std::string& url,
                             const std::string& content) OVERRIDE;
   virtual void RequestFileSystems() OVERRIDE;
   virtual void AddFileSystem() OVERRIDE;
@@ skipping 67 matching lines @@
       scoped_refptr<DevToolsFileSystemIndexer::FileSystemIndexingJob> >
       IndexingJobsMap;
   IndexingJobsMap indexing_jobs_;
   gfx::Insets contents_insets_;
   // True if we're in the process of handling a beforeunload event originating
   // from the inspected webcontents, see InterceptPageBeforeUnload for details.
   bool intercepted_page_beforeunload_;
 
   scoped_ptr<DevToolsEmbedderMessageDispatcher> embedder_message_dispatcher_;
   base::WeakPtrFactory<DevToolsWindow> weak_factory_;
+  base::TimeTicks inspect_element_start_time_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsWindow);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_WINDOW_H_