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

android_webview/native/render_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/render_helper.h"
+
+#include "jni/RenderHelper_jni.h"
+
+using base::android::ScopedJavaLocalRef;
+
+namespace android_webview {
+
+RenderHelper::RenderHelper() {
+}
+
+RenderHelper::~RenderHelper() {
+}
+
+ScopedJavaLocalRef<jobject> RenderHelper::CreateBitmap(JNIEnv* env,
+                                                       int width,
+                                                       int height) {
+  return Java_RenderHelper_createBitmap(env, width, height);
+}
+
+void RenderHelper::DrawBitmapIntoCanvas(JNIEnv* env,
+                                        jobject jbitmap,
+                                        jobject jcanvas) {
+  Java_RenderHelper_drawBitmapIntoCanvas(env, jbitmap, jcanvas);
+}
+
+ScopedJavaLocalRef<jobject> RenderHelper::RecordRasterizedBitmap(
+    JNIEnv* env, jobject jbitmap) {
+  return Java_RenderHelper_recordRasterizedBitmap(env, jbitmap);
+}
+
+bool RegisterRenderHelper(JNIEnv* env) {
+  return RegisterNativesImpl(env) >= 0;
+}
+
+}  // namespace android_webview