No longer register app window placement preference keys on the fly.

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 "chrome/browser/devtools/devtools_contents_resizing_strategy.h"
 #include "chrome/browser/devtools/devtools_toggle_action.h"
 #include "chrome/browser/devtools/devtools_ui_bindings.h"
@@ skipping 208 matching lines @@
                              const std::string& settings);
   static DevToolsWindow* FindDevToolsWindow(content::DevToolsAgentHost*);
   static DevToolsWindow* AsDevToolsWindow(content::WebContents*);
   static DevToolsWindow* CreateDevToolsWindowForWorker(Profile* profile);
   static DevToolsWindow* ToggleDevToolsWindow(
       content::WebContents* web_contents,
       bool force_open,
       const DevToolsToggleAction& action,
       const std::string& settings);
 
-  static std::string GetDevToolsWindowPlacementPrefKey();
-
   // content::WebContentsDelegate:
   virtual content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) OVERRIDE;
   virtual void ActivateContents(content::WebContents* contents) OVERRIDE;
   virtual void AddNewContents(content::WebContents* source,
                               content::WebContents* new_contents,
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
                               bool user_gesture,
@@ skipping 72 matching lines @@
   base::Closure close_callback_;
 
   base::TimeTicks inspect_element_start_time_;
   scoped_ptr<DevToolsEventForwarder> event_forwarder_;
 
   friend class DevToolsEventForwarder;
   DISALLOW_COPY_AND_ASSIGN(DevToolsWindow);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_WINDOW_H_