Revert of Add Java wrapper for RenderFrameHost

content/public/android/java/src/org/chromium/content/browser/framehost/RenderFrameHostImpl.java

-// Copyright 2017 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.framehost;
-
-import org.chromium.base.annotations.CalledByNative;
-import org.chromium.base.annotations.JNINamespace;
-import org.chromium.content_public.browser.RenderFrameHost;
-
-/**
- * The RenderFrameHostImpl Java wrapper to allow communicating with the native RenderFrameHost
- * object.
- */
-@JNINamespace("content")
-public class RenderFrameHostImpl implements RenderFrameHost {
-    private long mNativeRenderFrameHostAndroid;
-    // mDelegate can be null.
-    final RenderFrameHostDelegate mDelegate;
-
-    private RenderFrameHostImpl(
-            long nativeRenderFrameHostAndroid, RenderFrameHostDelegate delegate) {
-        mNativeRenderFrameHostAndroid = nativeRenderFrameHostAndroid;
-        mDelegate = delegate;
-    }
-
-    @CalledByNative
-    private static RenderFrameHostImpl create(
-            long nativeRenderFrameHostAndroid, RenderFrameHostDelegate delegate) {
-        return new RenderFrameHostImpl(nativeRenderFrameHostAndroid, delegate);
-    }
-
-    @CalledByNative
-    private void clearNativePtr() {
-        mNativeRenderFrameHostAndroid = 0;
-    }
-
-    public RenderFrameHostDelegate getRenderFrameHostDelegate() {
-        return mDelegate;
-    }
-
-    @Override
-    public String getLastCommittedURL() {
-        if (mNativeRenderFrameHostAndroid == 0) return null;
-        return nativeGetLastCommittedURL(mNativeRenderFrameHostAndroid);
-    }
-
-    private native String nativeGetLastCommittedURL(long nativeRenderFrameHostAndroid);
-}