First part of remembering platform app window geometry.

chrome/browser/extensions/extension_system.h

Index: chrome/browser/extensions/extension_system.h
diff --git a/chrome/browser/extensions/extension_system.h b/chrome/browser/extensions/extension_system.h
index 884f03636975a83b9fbc590b4902867db12dce5d..791cce1645760c0e2cfea331d29dfffad1137148 100644
--- a/chrome/browser/extensions/extension_system.h
+++ b/chrome/browser/extensions/extension_system.h
@@ -35,6 +35,7 @@ class ManagementPolicy;
 class MessageService;
 class NavigationObserver;
 class RulesRegistryService;
+class ShellWindowGeometryCache;
 class StateStore;
 class UserScriptMaster;
 
@@ -85,6 +86,9 @@ class ExtensionSystem : public ProfileKeyedService {
   // The StateStore is created at startup.
   virtual StateStore* state_store() = 0;
 
+  // The ShellWindowGeometryCache is created at startup.
+  virtual ShellWindowGeometryCache* shell_window_geometry_cache() = 0;
+
   // Returns the IO-thread-accessible extension data.
   virtual ExtensionInfoMap* info_map() = 0;
 
@@ -151,6 +155,7 @@ class ExtensionSystemImpl : public ExtensionSystem {
   virtual ExtensionProcessManager* process_manager() OVERRIDE;
   virtual AlarmManager* alarm_manager() OVERRIDE;
   virtual StateStore* state_store() OVERRIDE;
+  virtual ShellWindowGeometryCache* shell_window_geometry_cache() OVERRIDE;
   virtual LazyBackgroundTaskQueue* lazy_background_task_queue()
       OVERRIDE;  // shared
   virtual ExtensionInfoMap* info_map() OVERRIDE;  // shared
@@ -188,6 +193,7 @@ class ExtensionSystemImpl : public ExtensionSystem {
     void Init(bool extensions_enabled);
 
     StateStore* state_store();
+    ShellWindowGeometryCache* shell_window_geometry_cache();
     ExtensionService* extension_service();
     ManagementPolicy* management_policy();
     UserScriptMaster* user_script_master();
@@ -202,6 +208,7 @@ class ExtensionSystemImpl : public ExtensionSystem {
     // The services that are shared between normal and incognito profiles.
 
     scoped_ptr<StateStore> state_store_;
+    scoped_ptr<ShellWindowGeometryCache> shell_window_geometry_cache_;
     scoped_ptr<ExtensionPrefs> extension_prefs_;
     // ExtensionService depends on the 2 above.
     scoped_ptr<ExtensionService> extension_service_;