[Chromecast] Turn CastContentWindow into an abstract interface.

chromecast/browser/android/cast_metrics_helper_android.cc

Index: chromecast/browser/android/cast_metrics_helper_android.cc
diff --git a/chromecast/android/cast_metrics_helper_android.cc b/chromecast/browser/android/cast_metrics_helper_android.cc
similarity index 87%
rename from chromecast/android/cast_metrics_helper_android.cc
rename to chromecast/browser/android/cast_metrics_helper_android.cc
index 3b68ec3fe61d0908e531e1bd92ae396e15eb3bba..e7cc764b2100aec2d08c793709f75570a532129f 100644
--- a/chromecast/android/cast_metrics_helper_android.cc
+++ b/chromecast/browser/android/cast_metrics_helper_android.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chromecast/android/cast_metrics_helper_android.h"
+#include "chromecast/browser/android/cast_metrics_helper_android.h"
 
 #include "chromecast/base/metrics/cast_metrics_helper.h"
 #include "jni/CastMetricsHelper_jni.h"
@@ -10,6 +10,7 @@
 using base::android::JavaParamRef;
 
 namespace chromecast {
+namespace shell {
 
 // static
 bool CastMetricsHelperAndroid::RegisterJni(JNIEnv* env) {
@@ -24,4 +25,5 @@ void LogMediaPause(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
   metrics::CastMetricsHelper::GetInstance()->LogMediaPause();
 }
 
+}  // namespace shell
 }  // namespace chromecast