Broadcast NotifyTimezoneChange to all RenderProcessHosts when the system time zone changes

content/public/android/java/src/org/chromium/content/browser/TimeZoneMonitor.java

Index: content/public/android/java/src/org/chromium/content/browser/TimeZoneMonitor.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/TimeZoneMonitor.java b/content/public/android/java/src/org/chromium/content/browser/TimeZoneMonitor.java
new file mode 100644
index 0000000000000000000000000000000000000000..0fcabe482f3dff3423d0d9184da0c94040b41fff
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/content/browser/TimeZoneMonitor.java
@@ -0,0 +1,68 @@
+// Copyright 2014 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.content.browser;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.util.Log;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+/**
+ * Android implementation details for content::TimeZoneMonitorAndroid.
+ */
+@JNINamespace("content")
+class TimeZoneMonitor {
+    private static final String TAG = "TimeZoneMonitor";
+
+    private final Context mAppContext;
+    private final IntentFilter mFilter = new IntentFilter(Intent.ACTION_TIMEZONE_CHANGED);
+    private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+           if (!intent.getAction().equals(Intent.ACTION_TIMEZONE_CHANGED)) {
+               Log.e(TAG, "unexpected intent");
+               return;
+           }
+
+           nativeTimeZoneChangedFromJava(mNativePtr);
+        }
+    };
+
+    private long mNativePtr;
+
+    /**
+     * Start listening for intents.
+     * @param nativePtr The native content::TimeZoneMonitorAndroid to notify of time zone changes.
+     */
+    private TimeZoneMonitor(Context context, long nativePtr) {
+        mAppContext = context.getApplicationContext();
+        mNativePtr = nativePtr;
+        mAppContext.registerReceiver(mBroadcastReceiver, mFilter);
+    }
+
+    @CalledByNative
+    static TimeZoneMonitor getInstance(Context context, long nativePtr) {
+        return new TimeZoneMonitor(context, nativePtr);
+    }
+
+    /**
+     * Stop listening for intents.
+     */
+    @CalledByNative
+    void stop() {
+        mAppContext.unregisterReceiver(mBroadcastReceiver);
+        mNativePtr = 0;
+    }
+
+    /**
+     * Native JNI call to content::TimeZoneMonitorAndroid::TimeZoneChanged.
+     * See content/browser/time_zone_monitor_android.cc.
+     */
+    private native void nativeTimeZoneChangedFromJava(long nativeTimeZoneMonitorAndroid);
+}