Remove PluginLoadObserver and related logic, it was only used for NPAPI.

content/child/npapi/plugin_stream_url.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 CONTENT_CHILD_NPAPI_PLUGIN_STREAM_URL_H_
-#define CONTENT_CHILD_NPAPI_PLUGIN_STREAM_URL_H_
-
-#include <vector>
-
-#include "base/memory/scoped_ptr.h"
-#include "content/child/npapi/plugin_stream.h"
-#include "content/child/npapi/webplugin_resource_client.h"
-#include "url/gurl.h"
-
-namespace content {
-class PluginInstance;
-class PluginURLFetcher;
-
-// A NPAPI Stream based on a URL.
-class PluginStreamUrl : public PluginStream,
-                        public WebPluginResourceClient {
- public:
-  // Create a new stream for sending to the plugin by fetching
-  // a URL. If notifyNeeded is set, then the plugin will be notified
-  // when the stream has been fully sent to the plugin.  Initialize
-  // must be called before the object is used.
-  PluginStreamUrl(unsigned long resource_id,
-                  const GURL &url,
-                  PluginInstance *instance,
-                  bool notify_needed,
-                  void *notify_data);
-
-  void SetPluginURLFetcher(PluginURLFetcher* fetcher);
-
-  void URLRedirectResponse(bool allow);
-
-  void FetchRange(const std::string& range);
-
-  // Stop sending the stream to the client.
-  // Overrides the base Close so we can cancel our fetching the URL if
-  // it is still loading.
-  bool Close(NPReason reason) override;
-  WebPluginResourceClient* AsResourceClient() override;
-  void CancelRequest() override;
-
-  // WebPluginResourceClient methods
-  void WillSendRequest(const GURL& url, int http_status_code) override;
-  void DidReceiveResponse(const std::string& mime_type,
-                          const std::string& headers,
-                          uint32 expected_length,
-                          uint32 last_modified,
-                          bool request_is_seekable) override;
-  void DidReceiveData(const char* buffer, int length, int data_offset) override;
-  void DidFinishLoading(unsigned long resource_id) override;
-  void DidFail(unsigned long resource_id) override;
-  bool IsMultiByteResponseExpected() override;
-  int ResourceId() override;
-  void AddRangeRequestResourceId(unsigned long resource_id) override;
-
- protected:
-  ~PluginStreamUrl() override;
-
- private:
-  void SetDeferLoading(bool value);
-
-  // In case of a redirect, this can be called to update the url.  But it must
-  // be called before Open().
-  void UpdateUrl(const char* url);
-
-  GURL url_;
-  unsigned long id_;
-
-  // Ids of additional resources requested via range requests issued on
-  // seekable streams.
-  // This is used when we're loading resources through the renderer, i.e. not
-  // using plugin_url_fetcher_.
-  std::vector<unsigned long> range_requests_;
-  // This is used when we're using plugin_url_fetcher_.
-  std::vector<PluginURLFetcher*> range_request_fetchers_;
-
-  // If the plugin participates in HTTP URL redirect handling then this member
-  // holds the url being redirected to while we wait for the plugin to make a
-  // decision on whether to allow or deny the redirect.
-  std::string pending_redirect_url_;
-
-  scoped_ptr<PluginURLFetcher> plugin_url_fetcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(PluginStreamUrl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_NPAPI_PLUGIN_STREAM_URL_H_