Removing ContentViewCore dependencies from direct WebContents functions.

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

 // 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.test.suitebuilder.annotation.SmallTest;
 
 import org.chromium.base.test.util.Feature;
 
@@ skipping 54 matching lines @@
     protected void setUp() throws Exception {
         super.setUp();
         mMessageObject = new MessageObject();
         setUpContentView(mMessageObject, "messageObject");
     }
 
     @SmallTest
     @Feature({"AndroidWebView", "Android-PostMessage"})
     public void testPostMessageToMainFrame() throws Throwable {
         ContentViewCore contentViewCore = getContentViewCore();
-        loadDataSync(contentViewCore, URL1, "text/html", false);
+        loadDataSync(contentViewCore.getWebContents().getNavigationController(), URL1, "text/html",
+                false);
         contentViewCore.postMessageToFrame(null, MESSAGE, SOURCE_ORIGIN, "*");
         mMessageObject.waitForMessage();
         assertEquals(MESSAGE, mMessageObject.getData());
         assertEquals(SOURCE_ORIGIN, mMessageObject.getOrigin());
     }
 }