[WIP][SVG 2/4] Make data URL handling in ResourceFetcher and WebURLLoaderImpl consistent

content/child/web_url_loader_impl.h

 // Copyright 2014 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_CHILD_WEB_URL_LOADER_IMPL_H_
 #define CONTENT_CHILD_WEB_URL_LOADER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
@@ skipping 35 matching lines @@
                                   const ResourceResponseInfo& info,
                                   blink::WebURLResponse* response,
                                   bool report_security_info);
   static void PopulateURLRequestForRedirect(
       const blink::WebURLRequest& request,
       const net::RedirectInfo& redirect_info,
       blink::WebReferrerPolicy referrer_policy,
       bool skip_service_worker,
       blink::WebURLRequest* new_request);
 
+  // We can optimize the handling of data URLs in most cases.
+  static bool CanHandleDataURLRequestLocally(
+      const blink::WebURLRequest&,
+      bool resource_dispatcher_exists);
+
   // WebURLLoader methods:
   void loadSynchronously(
       const blink::WebURLRequest& request,
       blink::WebURLResponse& response,
       blink::WebURLError& error,
       blink::WebData& data) override;
   void loadAsynchronously(
       const blink::WebURLRequest& request,
       blink::WebURLLoaderClient* client) override;
   void cancel() override;
   void setDefersLoading(bool value) override;
   void didChangePriority(blink::WebURLRequest::Priority new_priority,
                          int intra_priority_value) override;
   bool attachThreadedDataReceiver(
       blink::WebThreadedDataReceiver* threaded_data_receiver) override;
   void setLoadingTaskRunner(blink::WebTaskRunner* loading_task_runner) override;
 
  private:
   class Context;
   class RequestPeerImpl;
   scoped_refptr<Context> context_;
 
   DISALLOW_COPY_AND_ASSIGN(WebURLLoaderImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEB_URL_LOADER_IMPL_H_