Move app launch metric recording code from NTP to chrome/common.

chrome/browser/ui/webui/ntp/core_app_launcher_handler.h

Index: chrome/browser/ui/webui/ntp/core_app_launcher_handler.h
diff --git a/chrome/browser/ui/webui/ntp/core_app_launcher_handler.h b/chrome/browser/ui/webui/ntp/core_app_launcher_handler.h
index 8b2d7cff50e32170988311ad5c4196a271a7c37a..3db6cdb29fe0173dd759053fd2a6ab157157f448 100644
--- a/chrome/browser/ui/webui/ntp/core_app_launcher_handler.h
+++ b/chrome/browser/ui/webui/ntp/core_app_launcher_handler.h
@@ -29,22 +29,9 @@ class CoreAppLauncherHandler : public content::WebUIMessageHandler {
   CoreAppLauncherHandler();
   ~CoreAppLauncherHandler() override;
 
-  // Records the given type of app launch for UMA.
-  static void RecordAppLaunchType(extension_misc::AppLaunchBucket bucket,
-                                  extensions::Manifest::Type app_type);
-
   // Register app launcher preferences.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
-  // Records an app launch from the search view of the app list.
-  static void RecordAppListSearchLaunch(const extensions::Extension* extension);
-
-  // Records an app launch from the main view of the app list.
-  static void RecordAppListMainLaunch(const extensions::Extension* extension);
-
-  // Records a web store launch in the appropriate histograms.
-  static void RecordWebStoreLaunch();
-
  private:
   // Callback for the "recordAppLaunchByUrl" message. Takes an escaped URL and
   // a launch source(integer), and if the URL represents an app, records the