Add postMessage APIs to the support lib

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

Index: Application/src/main/java/org/chromium/customtabsclient/MainActivity.java
diff --git a/Application/src/main/java/org/chromium/customtabsclient/MainActivity.java b/Application/src/main/java/org/chromium/customtabsclient/MainActivity.java
index a74b2e23523e065706c06c814fb8a5b941f41b04..4d8aa6fc3f850c75aacd91031ca21b9cf7e7b1d8 100644
--- a/Application/src/main/java/org/chromium/customtabsclient/MainActivity.java
+++ b/Application/src/main/java/org/chromium/customtabsclient/MainActivity.java
@@ -18,6 +18,7 @@ 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;
@@ -168,6 +169,12 @@ public class MainActivity extends Activity implements OnClickListener, ServiceCo
         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);