Componentizes external_video_surface to reduce webview/Cast duplication.

components/external_video_surface/component_jni_registrar.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "components/service_tab_launcher/component_jni_registrar.h"
+#include "components/external_video_surface/component_jni_registrar.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
-#include "components/service_tab_launcher/browser/android/service_tab_launcher.h"
+#include "components/external_video_surface/browser/android/external_video_surface_container_impl.h"
 
-namespace service_tab_launcher {
+namespace external_video_surface {
 
 static base::android::RegistrationMethod kComponentRegisteredMethods[] = {
-  { "ServiceTabLauncher", ServiceTabLauncher::RegisterServiceTabLauncher },
+  { "ExternalVideoSurface", ExternalVideoSurfaceContainerImpl::RegisterJni },
 };
 
-bool RegisterServiceTabLauncherJni(JNIEnv* env) {
+bool RegisterExternalVideoSurfaceJni(JNIEnv* env) {
   return RegisterNativeMethods(env,
       kComponentRegisteredMethods, arraysize(kComponentRegisteredMethods));
 }
 
-} // namespace service_tab_launcher
+} // namespace external_video_surface