[Android WebView] Migrate the rendering code to a separate set of classes.

android_webview/native/java_browser_view_renderer_helper.cc

+// Copyright (c) 2013 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.
+
+#include "android_webview/native/java_browser_view_renderer_helper.h"
+
+#include "jni/JavaBrowserViewRendererHelper_jni.h"
+
+using base::android::JavaRef;
+using base::android::ScopedJavaLocalRef;
+
+namespace android_webview {
+
+JavaBrowserViewRendererHelper::JavaBrowserViewRendererHelper() {
+}
+
+JavaBrowserViewRendererHelper::~JavaBrowserViewRendererHelper() {
+}
+
+ScopedJavaLocalRef<jobject> JavaBrowserViewRendererHelper::CreateBitmap(
+    JNIEnv* env,
+    int width,
+    int height) {
+  return Java_JavaBrowserViewRendererHelper_createBitmap(env, width, height);
+}
+
+void JavaBrowserViewRendererHelper::DrawBitmapIntoCanvas(
+    JNIEnv* env,
+    const JavaRef<jobject>& jbitmap,
+    const JavaRef<jobject>& jcanvas) {
+  Java_JavaBrowserViewRendererHelper_drawBitmapIntoCanvas(
+      env, jbitmap.obj(), jcanvas.obj());
+}
+
+ScopedJavaLocalRef<jobject>
+JavaBrowserViewRendererHelper::RecordBitmapIntoPicture(
+    JNIEnv* env,
+    const JavaRef<jobject>& jbitmap) {
+  return Java_JavaBrowserViewRendererHelper_recordBitmapIntoPicture(
+      env, jbitmap.obj());
+}
+
+bool RegisterJavaBrowserViewRendererHelper(JNIEnv* env) {
+  return RegisterNativesImpl(env) >= 0;
+}
+
+}  // namespace android_webview