Move PostMessageToFrame to WebContentsAndroid

content/public/android/javatests/src/org/chromium/content/browser/PostMessageTest.java

Index: content/public/android/javatests/src/org/chromium/content/browser/PostMessageTest.java
diff --git a/content/public/android/javatests/src/org/chromium/content/browser/PostMessageTest.java b/content/public/android/javatests/src/org/chromium/content/browser/PostMessageTest.java
index 35f2a1d12ef4afd66cca008eb3b1212f376da877..c11d66dc921c497ba936f016506ef40b6b293f81 100644
--- a/content/public/android/javatests/src/org/chromium/content/browser/PostMessageTest.java
+++ b/content/public/android/javatests/src/org/chromium/content/browser/PostMessageTest.java
@@ -7,6 +7,7 @@ package org.chromium.content.browser;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import org.chromium.base.test.util.Feature;
+import org.chromium.content_public.browser.WebContents;
 
 /**
  * The tests for content postMessage API.
@@ -71,10 +72,9 @@ public class PostMessageTest extends ContentViewTestBase {
     @SmallTest
     @Feature({"AndroidWebView", "Android-PostMessage"})
     public void testPostMessageToMainFrame() throws Throwable {
-        ContentViewCore contentViewCore = getContentViewCore();
-        loadDataSync(contentViewCore.getWebContents().getNavigationController(), URL1, "text/html",
-                false);
-        contentViewCore.postMessageToFrame(null, MESSAGE, SOURCE_ORIGIN, "*");
+        WebContents webContents = getContentViewCore().getWebContents();
+        loadDataSync(webContents.getNavigationController(), URL1, "text/html", false);
+        webContents.postMessageToFrame(null, MESSAGE, SOURCE_ORIGIN, "*");
         mMessageObject.waitForMessage();
         assertEquals(MESSAGE, mMessageObject.getData());
         assertEquals(SOURCE_ORIGIN, mMessageObject.getOrigin());