Move ExtensionHost into extensions namespace

chrome/browser/ui/cocoa/extensions/extension_popup_controller.h

Index: chrome/browser/ui/cocoa/extensions/extension_popup_controller.h
diff --git a/chrome/browser/ui/cocoa/extensions/extension_popup_controller.h b/chrome/browser/ui/cocoa/extensions/extension_popup_controller.h
index 06a4d23a7dc189b79383083eb63cb5e818dc96e2..782505d382a9e26b356f8e9a72f75b556cc04754 100644
--- a/chrome/browser/ui/cocoa/extensions/extension_popup_controller.h
+++ b/chrome/browser/ui/cocoa/extensions/extension_popup_controller.h
@@ -16,13 +16,16 @@
 
 class Browser;
 class DevtoolsNotificationBridge;
-class ExtensionHost;
 class ExtensionPopupContainer;
 
 namespace content {
 class NotificationRegistrar;
 }
 
+namespace extensions {
+class ExtensionHost;
+}
+
 // This controller manages a single browser action popup that can appear once a
 // user has clicked on a browser action button. It instantiates the extension
 // popup view showing the content and resizes the window to accomodate any size
@@ -40,7 +43,7 @@ class NotificationRegistrar;
   NSRect extensionFrame_;
 
   // The extension host object.
-  scoped_ptr<ExtensionHost> host_;
+  scoped_ptr<extensions::ExtensionHost> host_;
 
   scoped_ptr<content::NotificationRegistrar> registrar_;
   scoped_ptr<DevtoolsNotificationBridge> notificationBridge_;
@@ -54,7 +57,7 @@ class NotificationRegistrar;
 }
 
 // Returns the ExtensionHost object associated with this popup.
-- (ExtensionHost*)extensionHost;
+- (extensions::ExtensionHost*)extensionHost;
 
 // Starts the process of showing the given popup URL. Instantiates an
 // ExtensionPopupController with the parent window retrieved from |browser|, a