Move MimeTypeResourceHandler before ThrottlingResourceHandler

content/browser/loader/mime_type_resource_handler.h

Index: content/browser/loader/mime_type_resource_handler.h
diff --git a/content/browser/loader/mime_type_resource_handler.h b/content/browser/loader/mime_type_resource_handler.h
deleted file mode 100644
index f5581a6a8072522363e1f61e1030129b3ec9d4f2..0000000000000000000000000000000000000000
--- a/content/browser/loader/mime_type_resource_handler.h
+++ /dev/null
@@ -1,140 +0,0 @@
-// 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 CONTENT_BROWSER_LOADER_MIME_TYPE_RESOURCE_HANDLER_H_
-#define CONTENT_BROWSER_LOADER_MIME_TYPE_RESOURCE_HANDLER_H_
-
-#include <string>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "content/browser/loader/layered_resource_handler.h"
-#include "content/common/content_export.h"
-#include "content/public/browser/resource_controller.h"
-
-namespace net {
-class URLRequest;
-}
-
-namespace content {
-class PluginService;
-class ResourceDispatcherHostImpl;
-struct WebPluginInfo;
-
-// ResourceHandler that, if necessary, buffers a response body without passing
-// it to the next ResourceHandler until it can perform mime sniffing on it.
-// Once a response's MIME type is known, initiates special handling of the
-// response if needed (starts downloads, sends data to some plugin types via a
-// special channel).
-//
-// Uses the buffer provided by the original event handler for buffering, and
-// continues to reuses it until it can determine the MIME type
-// subsequent reads until it's done buffering.  As a result, the buffer
-// returned by the next ResourceHandler must have a capacity of at least
-// net::kMaxBytesToSniff * 2.
-//
-// Before a request is sent, this ResourceHandler will also set an appropriate
-// Accept header on the request based on its ResourceType, if one isn't already
-// present.
-class CONTENT_EXPORT MimeTypeResourceHandler
-    : public LayeredResourceHandler,
-      public ResourceController {
- public:
-  // If ENABLE_PLUGINS is defined, |plugin_service| must not be NULL.
-  MimeTypeResourceHandler(std::unique_ptr<ResourceHandler> next_handler,
-                          ResourceDispatcherHostImpl* host,
-                          PluginService* plugin_service,
-                          net::URLRequest* request);
-  ~MimeTypeResourceHandler() override;
-
- private:
-  // ResourceHandler implementation:
-  void SetController(ResourceController* controller) override;
-  bool OnResponseStarted(ResourceResponse* response, bool* defer) override;
-  bool OnWillStart(const GURL&, bool* defer) override;
-  bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
-                  int* buf_size,
-                  int min_size) override;
-  bool OnReadCompleted(int bytes_read, bool* defer) override;
-  void OnResponseCompleted(const net::URLRequestStatus& status,
-                           const std::string& security_info,
-                           bool* defer) override;
-
-  // ResourceController implementation:
-  void Resume() override;
-  void Cancel() override;
-  void CancelAndIgnore() override;
-  void CancelWithError(int error_code) override;
-
-  bool ProcessResponse(bool* defer);
-
-  bool ShouldSniffContent();
-  bool DetermineMimeType();
-  // Determines whether a plugin will handle the current request, and if so,
-  // sets up the handler to direct the response to that plugin. Returns false
-  // if there is an error and the request should be cancelled and true
-  // otherwise. |defer| is set to true if plugin data is stale and needs to be
-  // refreshed before the request can be handled (in this case the function
-  // still returns true). If the request is directed to a plugin,
-  // |handled_by_plugin| is set to true.
-  bool SelectPluginHandler(bool* defer, bool* handled_by_plugin);
-  // Returns false if the request should be cancelled.
-  bool SelectNextHandler(bool* defer);
-  bool UseAlternateNextHandler(std::unique_ptr<ResourceHandler> handler,
-                               const std::string& payload_for_old_handler);
-
-  bool ReplayReadCompleted(bool* defer);
-  void CallReplayReadCompleted();
-
-  bool MustDownload();
-
-  // Copies data from |read_buffer_| to |next_handler_|.
-  bool CopyReadBufferToNextHandler();
-
-  // Called on the IO thread once the list of plugins has been loaded.
-  void OnPluginsLoaded(const std::vector<WebPluginInfo>& plugins);
-
-  enum State {
-    STATE_STARTING,
-
-    // In this state, we are filling read_buffer_ with data for the purpose
-    // of sniffing the mime type of the response.
-    STATE_BUFFERING,
-
-    // In this state, we are select an appropriate downstream ResourceHandler
-    // based on the mime type of the response.  We are also potentially waiting
-    // for plugins to load so that we can determine if a plugin is available to
-    // handle the mime type.
-    STATE_PROCESSING,
-
-    // In this state, we are replaying buffered events (OnResponseStarted and
-    // OnReadCompleted) to the downstream ResourceHandler.
-    STATE_REPLAYING,
-
-    // In this state, we are just a blind pass-through ResourceHandler.
-    STATE_STREAMING
-  };
-  State state_;
-
-  scoped_refptr<ResourceResponse> response_;
-  ResourceDispatcherHostImpl* host_;
-#if defined(ENABLE_PLUGINS)
-  PluginService* plugin_service_;
-#endif
-  scoped_refptr<net::IOBuffer> read_buffer_;
-  int read_buffer_size_;
-  int bytes_read_;
-
-  bool must_download_;
-  bool must_download_is_set_;
-
-  base::WeakPtrFactory<MimeTypeResourceHandler> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(MimeTypeResourceHandler);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_LOADER_MIME_TYPE_RESOURCE_HANDLER_H_