Add a mimeHandler extension API.

chrome/browser/extensions/api/streams_private/streams_private_api.h

 // Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_
 
 #include <map>
 #include <string>
 
@@ skipping 56 matching lines @@
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() {
     return "StreamsPrivateAPI";
   }
   static const bool kServiceIsNULLWhileTesting = true;
   static const bool kServiceRedirectedInIncognito = true;
 
   content::BrowserContext* const browser_context_;
   StreamMap streams_;
 
-  // The streams whose lifetimes are managed by MimeHandlerViewGuest.
-  std::map<std::string,
-           std::map<GURL, std::pair<content::WebContents*, std::string>>>
-      mime_handler_streams_;
-
   // Listen to extension unloaded notifications.
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   base::WeakPtrFactory<StreamsPrivateAPI> weak_ptr_factory_;
 
 };
 
 class StreamsPrivateAbortFunction : public UIThreadExtensionFunction {
  public:
   StreamsPrivateAbortFunction();
   DECLARE_EXTENSION_FUNCTION("streamsPrivate.abort", STREAMSPRIVATE_ABORT)
 
  protected:
   ~StreamsPrivateAbortFunction() override {}
 
   // ExtensionFunction:
   ExtensionFunction::ResponseAction Run() override;
 
  private:
   void OnClose();
 
   std::string stream_url_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_