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

android_webview/native/java_browser_view_renderer_helper.h

+// 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.
+
+#ifndef ANDROID_WEBVIEW_NATIVE_JAVA_BROWSER_VIEW_RENDERER_HELPER_H_
+#define ANDROID_WEBVIEW_NATIVE_JAVA_BROWSER_VIEW_RENDERER_HELPER_H_
+
+#include "android_webview/browser/browser_view_renderer.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/compiler_specific.h"
+
+namespace android_webview {
+
+// Native side of java-class of same name.
+// Provides utility methods for rendering involving with Java objects.
+class JavaBrowserViewRendererHelper : public BrowserViewRenderer::JavaHelper {
+ public:
+  JavaBrowserViewRendererHelper();
+  virtual ~JavaBrowserViewRendererHelper();
+
+  // BrowserViewRenderer::JavaHelper implementation.
+  virtual base::android::ScopedJavaLocalRef<jobject> CreateBitmap(
+      JNIEnv* env,
+      int width,
+      int height) OVERRIDE;
+  virtual void DrawBitmapIntoCanvas(
+      JNIEnv* env,
+      const base::android::JavaRef<jobject>& jbitmap,
+      const base::android::JavaRef<jobject>& jcanvas) OVERRIDE;
+  virtual base::android::ScopedJavaLocalRef<jobject> RecordBitmapIntoPicture(
+     JNIEnv* env,
+     const base::android::JavaRef<jobject>& jbitmap) OVERRIDE;
+};
+
+bool RegisterJavaBrowserViewRendererHelper(JNIEnv* env);
+
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_NATIVE_JAVA_BROWSER_VIEW_RENDERER_HELPER_H_