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

chrome/browser/ui/browser_window_state.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_UI_BROWSER_WINDOW_STATE_H_
 #define CHROME_BROWSER_UI_BROWSER_WINDOW_STATE_H_
 
 #include <string>
 
+#include "base/memory/scoped_ptr.h"
+#include "base/prefs/scoped_user_pref_update.h"
 #include "ui/base/ui_base_types.h"
 
 class Browser;
 
+namespace base {
+class DictionaryValue;
+}
+
 namespace gfx {
 class Rect;
 }
 
+class PrefService;
+
 namespace chrome {
 
-std::string GetWindowPlacementKey(const Browser* browser);
+std::string GetWindowName(const Browser* browser);
+// A "window placement dictionary" holds information about the size and location
+// of the window that is stored in the given PrefService. If the window_name
+// isn't the name of a registered preference it is assumed to be the name of an
+// app and the AppWindowPlacement key is used to find the app's dictionary.
+scoped_ptr<DictionaryPrefUpdate> GetWindowPlacementDictionaryReadWrite(
+    const std::string& window_name,
+    PrefService* prefs);
+// Returns NULL if the window corresponds to an app that doesn't have placement
+// information stored in the preferences system.
+const base::DictionaryValue* GetWindowPlacementDictionaryReadOnly(
+    const std::string& window_name,
+    PrefService* prefs);
 
 bool ShouldSaveWindowPlacement(const Browser* browser);
 
 void SaveWindowPlacement(const Browser* browser,
                          const gfx::Rect& bounds,
                          ui::WindowShowState show_state);
 
 // Return the |bounds| for the browser window to be used upon creation.
 // The |show_state| variable will receive the desired initial show state for
 // the window.
 void GetSavedWindowBoundsAndShowState(const Browser* browser,
                                       gfx::Rect* bounds,
                                       ui::WindowShowState* show_state);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BROWSER_WINDOW_STATE_H_