Add postMessage APIs to the support lib

Application/src/main/java/org/chromium/customtabsclient/MainActivity.java

 // Copyright 2015 Google Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 package org.chromium.customtabsclient;
 
 import android.app.Activity;
 import android.app.ActivityOptions;
 import android.app.PendingIntent;
 import android.content.Intent;
+import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Color;
 import android.media.MediaPlayer;
 import android.net.Uri;
 import android.os.Bundle;
 import android.support.customtabs.CustomTabsCallback;
 import android.support.customtabs.CustomTabsClient;
@@ skipping 130 matching lines @@
     }
 
     @Override
     public void onClick(View v) {
         String url = mEditText.getText().toString();
         int viewId = v.getId();
 
         if (viewId == R.id.connect_button) {
             bindCustomTabsService();
         } else if (viewId == R.id.warmup_button) {
+            try {
+                PackageInfo info = getPackageManager().getPackageInfo("com.twitter.android", 0);

[Benoit L, 2016/11/09 10:11:00]

You probably want to remove these lines.
:-)

[Yusuf, 2016/11/09 18:29:21]

ha!

+                android.util.Log.e("Yusuf",info.signatures[0].toString());
+            } catch (PackageManager.NameNotFoundException e) {
+                //do nothing;
+            }
             boolean success = false;
             if (mClient != null) success = mClient.warmup(0);
             if (!success) mWarmupButton.setEnabled(false);
         } else if (viewId == R.id.may_launch_button) {
             CustomTabsSession session = getSession();
             boolean success = false;
             if (mClient != null) success = session.mayLaunchUrl(Uri.parse(url), null, null);
             if (!success) mMayLaunchButton.setEnabled(false);
         } else if (viewId == R.id.launch_button) {
             CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder(getSession());
@@ skipping 50 matching lines @@
 
     @Override
     public void onServiceDisconnected() {
         mConnectButton.setEnabled(true);
         mWarmupButton.setEnabled(false);
         mMayLaunchButton.setEnabled(false);
         mLaunchButton.setEnabled(false);
         mClient = null;
     }
 }