Chromecast: adds CastMetricsHelper API from Java.

chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastMetricsHelper.java

Index: chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastMetricsHelper.java
diff --git a/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastMetricsHelper.java b/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastMetricsHelper.java
new file mode 100644
index 0000000000000000000000000000000000000000..600e4f8262aca0740eec62707a6e33e13132bbc5
--- /dev/null
+++ b/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastMetricsHelper.java
@@ -0,0 +1,25 @@
+// 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.
+
+package org.chromium.chromecast.shell;
+
+import org.chromium.base.JNINamespace;
+
+/**
+ * Wrapper of native CastMetricsHelper.
+ */
+@JNINamespace("chromecast")
+public final class CastMetricsHelper {
+
+    public static void logMediaPlay() {
+        nativeLogMediaPlay();
+    }
+    private static native void nativeLogMediaPlay();
+
+    public static void logMediaPause() {
+        nativeLogMediaPause();
+    }
+    private static native void nativeLogMediaPause();
+
+}