Add Java wrapper for RenderFrameHost

content/public/android/javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java

 // Copyright 2015 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.webcontents;
 
 import android.annotation.SuppressLint;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.support.test.filters.SmallTest;
 
 import org.chromium.base.ThreadUtils;
+import org.chromium.content_public.browser.RenderFrameHost;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_shell.Shell;
 import org.chromium.content_shell_apk.ContentShellActivity;
 import org.chromium.content_shell_apk.ContentShellTestBase;
 
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 
 /**
  * Test various Java WebContents specific features.
@@ skipping 279 matching lines @@
             assertNull("Unexpectedly deserialized a WebContents", deserializedWebContents);
 
             // Make sure we can properly deserialize the String after the WebContents.
             assertEquals("Failing to read the WebContents corrupted the parcel",
                     PARCEL_STRING_TEST_DATA, parcel.readString());
         } finally {
             parcel.recycle();
         }
     }
 
+    /**
+     * Check that the main frame associated with the WebContents is not null
+     * and corresponds with the test URL.
+     *
+     * @throws InterruptedException
+     */
+    @SmallTest
+    public void testWebContentsGetMainFrame() throws InterruptedException {
+        final ContentShellActivity activity = launchContentShellWithUrl(TEST_URL_1);
+        waitForActiveShellToBeDoneLoading();
+        final WebContents webContents = activity.getActiveWebContents();
+
+        ThreadUtils.postOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                RenderFrameHost frameHost = webContents.getMainFrame();
+
+                assertNotNull(frameHost);
+
+                assertEquals("RenderFrameHost has incorrect last committed URL", "about:blank",
+                        frameHost.getLastCommittedURL());
+
+                assertEquals("RenderFrameHost associated with different WebContents", webContents,
+                        RenderFrameHost.getWebContents(frameHost));
+            }
+        });
+    }
+
     private boolean isWebContentsDestroyed(final WebContents webContents) {
         return ThreadUtils.runOnUiThreadBlockingNoException(new Callable<Boolean>() {
             @Override
             public Boolean call() throws Exception {
                 return webContents.isDestroyed();
             }
         });
     }
 }