Move Extension into extensions namespace

chrome/browser/ui/views/browser_dialogs.h

Index: chrome/browser/ui/views/browser_dialogs.h
diff --git a/chrome/browser/ui/views/browser_dialogs.h b/chrome/browser/ui/views/browser_dialogs.h
index 16f8d1b2d67ce8d39f5946ccc4e07dc3d93d0918..3a0a4647c4333c6b76bdd581a589483c45674cf8 100644
--- a/chrome/browser/ui/views/browser_dialogs.h
+++ b/chrome/browser/ui/views/browser_dialogs.h
@@ -19,7 +19,6 @@
 
 class BrowserView;
 class EditSearchEngineControllerDelegate;
-class Extension;
 class FindBar;
 class GURL;
 class Profile;
@@ -30,6 +29,10 @@ namespace content {
 struct SSLStatus;
 }
 
+namespace extensions {
+class Extension;
+}
+
 namespace gfx {
 class Size;
 }
@@ -91,7 +94,7 @@ void ShowCreateWebAppShortcutsDialog(gfx::NativeWindow parent_window,
 // Shows the create chrome app shortcut dialog box.
 void ShowCreateChromeAppShortcutsDialog(gfx::NativeWindow parent_window,
                                         Profile* profile,
-                                        const Extension* app);
+                                        const extensions::Extension* app);
 
 }  // namespace browser