Add metrics for tracking how Chrome handled shortcut launches

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappMetrics.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappMetrics.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappMetrics.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappMetrics.java
deleted file mode 100644
index cf9f1dc85b670c1423da4f505922c09b8c5383fa..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappMetrics.java
+++ /dev/null
@@ -1,23 +0,0 @@
-// 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.chrome.browser.webapps;
-
-import org.chromium.base.JNINamespace;
-
-/**
- * Used for recording metrics about WebappActivity instances.
- */
-@JNINamespace("webapps")
-public class WebappMetrics {
-    /**
-     * Records the creation of a WebappActivity.
-     * @param url URL that kicked off the Activity's creation.
-     */
-    public static void recordActivityStart(String url) {
-        nativeRecordActivityStart(url);
-    }
-
-    private static native void nativeRecordActivityStart(String url);
-}