Don't show "Inspect Element" in the context menu if we can't inspect.

chrome/browser/browser_process.h

 // Copyright (c) 2006-2008 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.
 
 // This interfaces is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
@@ skipping 120 matching lines @@
   DownloadRequestManager* download_request_manager();
 
   // Returns an event that is signaled when the browser shutdown.
   virtual base::WaitableEvent* shutdown_event() = 0;
 
   // Returns a reference to the user-data-dir based profiles vector.
   std::vector<std::wstring>& user_data_dir_profiles() {
     return user_data_dir_profiles_;
   }
 
+  // Trigger an asynchronous check to see if we have the inspector's files on
+  // disk.
+  virtual void CheckForInspectorFiles() = 0;
+
+  // Return true iff we found the inspector files on disk. It's possible to
+  // call this function before we have a definite answer from the disk. In that
+  // case, we default to returning true.
+  virtual bool have_inspector_files() const = 0;
+
  private:
   // User-data-dir based profiles.
   std::vector<std::wstring> user_data_dir_profiles_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_