Navigation transitions: Parse out transition-entering-stylesheet link headers.

content/browser/transition_request_manager.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_BROWSER_TRANSITION_REQUEST_MANAGER_H_
 #define CONTENT_BROWSER_TRANSITION_REQUEST_MANAGER_H_
 
 #include <set>
 #include <utility>
+#include <vector>
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
+#include "url/gurl.h"
 
 template <typename T>
 struct DefaultSingletonTraits;
 
+namespace net {
+class HttpResponseHeaders;
+}
+
 namespace content {
 
 // TransitionRequestManager is used to handle bookkeeping for transition
 // requests and responses.
 //
 // TransitionRequestManager is a singleton and should only be accessed on the IO
 // thread.
 //
 class TransitionRequestManager {
  public:
   // Returns the singleton instance.
   CONTENT_EXPORT static TransitionRequestManager* GetInstance();
 
+  // Parses out any transition-entering-stylesheet link headers from the
+  // response headers.
+  CONTENT_EXPORT static void ParseTransitionStylesheetsFromHeaders(
+      const scoped_refptr<net::HttpResponseHeaders>& headers,
+      std::vector<GURL>& entering_stylesheets,
+      const GURL& resolve_address);
+
   // Returns whether the RenderFrameHost specified by the given IDs currently
   // has a pending transition request. If so, we will have to delay the
   // response until the embedder resumes the request.
   bool HasPendingTransitionRequest(int process_id, int render_frame_id);
 
   // Sets whether the RenderFrameHost specified by the given IDs currently has a
   // pending transition request.
   CONTENT_EXPORT void SetHasPendingTransitionRequest(int process_id,
                                                      int render_frame_id,
                                                      bool has_pending);
@@ skipping 10 matching lines @@
   // information to the CrossSiteResourceHandler without doing a round-trip
   // between IO->UI->IO threads.
   RenderFrameSet pending_transition_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(TransitionRequestManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TRANSITION_REQUEST_MANAGER_H_