[WIP] WebRestrictions

components/web_restriction/content_resolver_web_restriction_provider.h

+// Copyright 2015 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 COMPONENTS_WEB_RESTRICTION_CONTENT_RESOLVER_WEB_RESTRICTION_PROVIDER_H_
+#define COMPONENTS_WEB_RESTRICTION_CONTENT_RESOLVER_WEB_RESTRICTION_PROVIDER_H_
+
+#include <jni.h>
+
+#include "base/android/jni_android.h"
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/observer_list.h"
+#include "components/web_restriction/web_restriction_provider.h"
+
+namespace web_restriction {
+
+namespace android {
+class SelfDeletingCallback {
+ public:
+  SelfDeletingCallback(const GURL& url,
+                       const base::Callback<void(bool)>& callback);
+
+  void ShouldProceed(JNIEnv* env,
+                     const base::android::JavaParamRef<jobject>& obj,
+                     jboolean should_proceed);
+
+ private:
+  GURL url_;
+  base::Callback<void(bool)> callback_;
+
+  // Only the callback can delete itself. We must ensure it is indeed
+  // called back.
+  ~SelfDeletingCallback();
+};
+
+}  // namespace android
+
+class ContentResolverWebRestrictionProvider : public WebRestrictionProvider {
+ public:
+  ContentResolverWebRestrictionProvider();
+  ~ContentResolverWebRestrictionProvider() override;
+
+  // Register JNI methods.
+  static bool Register(JNIEnv* env);
+
+  // Verify the content provider and Setup.
+  void Initialize(const std::string& content_provider_authority);
+
+  // WebRestrictionProvider:
+  UrlAccess ShouldProceed(bool is_main_frame, const GURL& url) const override;
+
+  void ShouldProceed(bool is_main_frame,
+                     const GURL& url,
+                     const base::Callback<void(bool)>& callback) const override;

[aberent, 2015/11/16 12:39:08]

Change name to AsyncShouldProceed?

+
+  bool SupportsRequest() const override;
+
+  bool SupportsCustomErrorPage() const override;
+
+  std::string GetErrorHtml() const override;
+
+  void RequestPermission(const GURL& url) override;
+
+  void AddObserver(Observer* observer) override;
+
+  void RemoveObserver(Observer* observer) override;
+
+ private:
+  friend class SelfDeletingCallback;  // For updating the cache.
+
+  base::ObserverList<Observer> observer_list_;
+  base::android::ScopedJavaGlobalRef<jobject> java_provider_;
+
+  // Setup during Initialize.
+  bool initialized_;
+  bool supports_request_;
+  std::string error_page_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContentResolverWebRestrictionProvider);
+};
+
+}  // namespace web_restriction
+
+#endif  // COMPONENTS_WEB_RESTRICTION_CONTENT_RESOLVER_WEB_RESTRICTION_PROVIDER_H_