Moved apps metro code from apps to chrome/browser/apps.

chrome/browser/apps/chrome_apps_client.h

Index: chrome/browser/apps/chrome_apps_client.h
diff --git a/chrome/browser/apps/chrome_apps_client.h b/chrome/browser/apps/chrome_apps_client.h
index 7788961e60c94e5ed3612bc930132db852f36c9e..06273d1a9e7cdf24ae0e98ed6a04cc270566eab4 100644
--- a/chrome/browser/apps/chrome_apps_client.h
+++ b/chrome/browser/apps/chrome_apps_client.h
@@ -27,6 +27,11 @@ class ChromeAppsClient : public apps::AppsClient {
   virtual std::vector<content::BrowserContext*> GetLoadedBrowserContexts()
       OVERRIDE;
 
+  // Do any pre app launch checks. Returns true if the app launch should proceed
+  // or false if the launch should be prevented.
+  virtual bool CheckAppLaunch(content::BrowserContext* context,
+                              const extensions::Extension* extension) OVERRIDE;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeAppsClient);
 };