Make DevToolsManager a singleton, remove it from ContentBrowserClient

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index a4644947561fbffbb46f4d915e2855f71ac9c653..84a4641dcc081c4103b1a145a2b33f4e2ca09714 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -61,7 +61,6 @@ class BrowserProcessImpl : public BrowserProcess,
 #endif
   virtual ProfileManager* profile_manager() OVERRIDE;
   virtual PrefService* local_state() OVERRIDE;
-  virtual DevToolsManager* devtools_manager() OVERRIDE;
   virtual SidebarManager* sidebar_manager() OVERRIDE;
   virtual ui::Clipboard* clipboard() OVERRIDE;
   virtual net::URLRequestContextGetter* system_request_context() OVERRIDE;
@@ -141,7 +140,6 @@ class BrowserProcessImpl : public BrowserProcess,
   void CreateLocalState();
   void CreateViewedPageTracker();
   void CreateIconManager();
-  void CreateDevToolsManager();
   void CreateSidebarManager();
   void CreateGoogleURLTracker();
   void CreateIntranetRedirectDetector();
@@ -204,9 +202,6 @@ class BrowserProcessImpl : public BrowserProcess,
 
   scoped_refptr<DevToolsProtocolHandler> devtools_legacy_handler_;
 
-  bool created_devtools_manager_;
-  scoped_ptr<DevToolsManager> devtools_manager_;
-
   bool created_sidebar_manager_;
   scoped_refptr<SidebarManager> sidebar_manager_;