Add Java wrapper for RenderFrameHost

content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java

Index: content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
index 13aa756e8f9ed9dce4105cc23f939de6f1463569..2655c184646f4303a0c4826ac3cbfea87b54363b 100644
--- a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
+++ b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
@@ -27,6 +27,8 @@ import org.chromium.content_public.browser.ImageDownloadCallback;
 import org.chromium.content_public.browser.JavaScriptCallback;
 import org.chromium.content_public.browser.MessagePort;
 import org.chromium.content_public.browser.NavigationController;
+import org.chromium.content_public.browser.RenderFrameHost;
+import org.chromium.content_public.browser.RenderFrameHostDelegate;
 import org.chromium.content_public.browser.SmartClipCallback;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_public.browser.WebContentsObserver;
@@ -42,9 +44,9 @@ import java.util.UUID;
  * object.
  */
 @JNINamespace("content")
-//TODO(tedchoc): Remove the package restriction once this class moves to a non-public content
+// TODO(tedchoc): Remove the package restriction once this class moves to a non-public content
 //               package whose visibility will be enforced via DEPS.
-/* package */ class WebContentsImpl implements WebContents {
+/* package */ class WebContentsImpl implements WebContents, RenderFrameHostDelegate {
     private static final String PARCEL_VERSION_KEY = "version";
     private static final String PARCEL_WEBCONTENTS_KEY = "webcontents";
     private static final String PARCEL_PROCESS_GUARD_KEY = "processguard";
@@ -93,6 +95,7 @@ import java.util.UUID;
 
     private long mNativeWebContentsAndroid;
     private NavigationController mNavigationController;
+    private RenderFrameHost mMainFrame;
 
     // Lazily created proxy observer for handling all Java-based WebContentsObservers.
     private WebContentsObserverProxy mObserverProxy;
@@ -166,6 +169,14 @@ import java.util.UUID;
     }
 
     @Override
+    public RenderFrameHost getMainFrame() {
+        if (mMainFrame == null) {
+            mMainFrame = nativeGetMainFrame(mNativeWebContentsAndroid);
+        }
+        return mMainFrame;
+    }
+
+    @Override
     public String getTitle() {
         return nativeGetTitle(mNativeWebContentsAndroid);
     }
@@ -552,11 +563,17 @@ import java.util.UUID;
         sizes.add(new Rect(0, 0, width, height));
     }
 
+    @Override
+    public WebContents getAsWebContents() {
+        return this;
+    }
+
     // This is static to avoid exposing a public destroy method on the native side of this class.
     private static native void nativeDestroyWebContents(long webContentsAndroidPtr);
 
     private static native WebContents nativeFromNativePtr(long webContentsAndroidPtr);
 
+    private native RenderFrameHost nativeGetMainFrame(long nativeWebContentsAndroid);
     private native String nativeGetTitle(long nativeWebContentsAndroid);
     private native String nativeGetVisibleURL(long nativeWebContentsAndroid);
     private native boolean nativeIsLoading(long nativeWebContentsAndroid);