Add Java wrapper for RenderFrameHost

content/browser/frame_host/render_frame_host_android.h

+// 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.
+
+#ifndef CONTENT_BROWSER_FRAME_HOST_ANDROID_H_
+#define CONTENT_BROWSER_FRAME_HOST_ANDROID_H_
+
+#include <jni.h>
+
+#include <memory>
+
+#include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/supports_user_data.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class RenderFrameHostImpl;
+
+// Android wrapper around RenderFrameHost that provides safer passage from java
+// and back to native and provides java with a means of communicating with its
+// native counterpart.
+class CONTENT_EXPORT RenderFrameHostAndroid
+    : public base::SupportsUserData::Data {
+ public:
+  static bool Register(JNIEnv* env);
+
+  explicit RenderFrameHostAndroid(RenderFrameHostImpl* render_frame_host);
+  ~RenderFrameHostAndroid() override;
+
+  RenderFrameHostImpl* render_frame_host() const { return render_frame_host_; }
+
+  base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
+
+  // Methods called from Java
+  base::android::ScopedJavaLocalRef<jstring> GetLastCommittedURL(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>&) const;
+
+ private:
+  RenderFrameHostImpl* render_frame_host_;
+  base::android::ScopedJavaGlobalRef<jobject> obj_;

[boliu, 2017/02/15 02:12:51]

native strong ref is probably not ok due to webview, which relies on gc to
delete things, use JavaObjectWeakGlobalRef instead

(don't follow WebContents in this case, WebContents is wrong..)

[rwlbuis, 2017/02/15 22:08:48]

Done.

+
+  base::WeakPtrFactory<RenderFrameHostAndroid> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(RenderFrameHostAndroid);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_FRAME_HOST_ANDROID_H_