In-process JSON parsing for web resources on iOS

ios/chrome/browser/web_resource/ios_web_resource_service.h

Index: ios/chrome/browser/web_resource/ios_web_resource_service.h
diff --git a/ios/chrome/browser/web_resource/ios_web_resource_service.h b/ios/chrome/browser/web_resource/ios_web_resource_service.h
new file mode 100644
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+++ b/ios/chrome/browser/web_resource/ios_web_resource_service.h
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+// 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 IOS_CHROME_BROWSER_WEB_RESOURCE_IOS_WEB_RESOURCE_SERVICE_H_
+#define IOS_CHROME_BROWSER_WEB_RESOURCE_IOS_WEB_RESOURCE_SERVICE_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/web_resource/web_resource_service.h"
+
+// iOS implementation of WebResourceService.
+// IOSWebResourceService does not parses JSON out of process, because of
+// platform limitations.
+class IOSWebResourceService : public web_resource::WebResourceService {
+ public:
+  IOSWebResourceService(PrefService* prefs,
+                        const GURL& web_resource_server,
+                        bool apply_locale_to_url,
+                        const char* last_update_time_pref_name,
+                        int start_fetch_delay_ms,
+                        int cache_update_delay_ms);
+
+ protected:
+  ~IOSWebResourceService() override;
+
+ private:
+  // Parses JSON in a background thread.
+  static base::Closure ParseJSONOnBackgroundThread(
+      const std::string& data,
+      const SuccessCallback& success_callback,
+      const ErrorCallback& error_callback);
+
+  // WebResourceService implementation:
+  void ParseJSON(const std::string& data,
+                 const SuccessCallback& success_callback,
+                 const ErrorCallback& error_callback) override;
+  net::URLRequestContextGetter* GetRequestContext() override;
+
+  DISALLOW_COPY_AND_ASSIGN(IOSWebResourceService);
+};
+
+#endif  // IOS_CHROME_BROWSER_WEB_RESOURCE_IOS_WEB_RESOURCE_SERVICE_H_