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

content/child/npapi/webplugin_delegate_impl.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_WEBPLUGIN_DELEGATE_IMPL_H_
 #define CONTENT_CHILD_NPAPI_WEBPLUGIN_DELEGATE_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 74 matching lines @@
   void PluginDestroyed() override;
   void UpdateGeometry(const gfx::Rect& window_rect,
                       const gfx::Rect& clip_rect) override;
   void Paint(SkCanvas* canvas, const gfx::Rect& rect) override;
   void SetFocus(bool focused) override;
   bool HandleInputEvent(const blink::WebInputEvent& event,
                         WebCursor::CursorInfo* cursor_info) override;
   NPObject* GetPluginScriptableObject() override;
   NPP GetPluginNPP() override;
   bool GetFormValue(base::string16* value) override;
-  void DidFinishLoadWithReason(const GURL& url,
-                               NPReason reason,
-                               int notify_id) override;
   int GetProcessId() override;
-  void SendJavaScriptStream(const GURL& url,
-                            const std::string& result,
-                            bool success,
-                            int notify_id) override;
-  void DidReceiveManualResponse(const GURL& url,
-                                const std::string& mime_type,
-                                const std::string& headers,
-                                uint32 expected_length,
-                                uint32 last_modified) override;
-  void DidReceiveManualData(const char* buffer, int length) override;
-  void DidFinishManualLoading() override;
-  void DidManualLoadFail() override;
-  WebPluginResourceClient* CreateResourceClient(unsigned long resource_id,
-                                                const GURL& url,
-                                                int notify_id) override;
-  WebPluginResourceClient* CreateSeekableResourceClient(
-      unsigned long resource_id,
-      int range_request_id) override;
-  void FetchURL(unsigned long resource_id,
-                int notify_id,
-                const GURL& url,
-                const GURL& first_party_for_cookies,
-                const std::string& method,
-                const char* buf,
-                unsigned int len,
-                const Referrer& referrer,
-                bool notify_redirects,
-                bool is_plugin_src_load,
-                int origin_pid,
-                int render_frame_id,
-                int render_view_id) override;
   // End of WebPluginDelegate implementation.
 
   gfx::PluginWindowHandle windowed_handle() const { return windowed_handle_; }
   bool IsWindowless() const { return windowless_; }
   PluginInstance* instance() { return instance_.get(); }
   gfx::Rect GetRect() const { return window_rect_; }
   gfx::Rect GetClipRect() const { return clip_rect_; }
 
   // Returns the path for the library implementing this plugin.
   base::FilePath GetPluginPath();
@@ skipping 331 matching lines @@
   // asynchronously.
   base::WeakPtrFactory<WebPluginDelegateImpl> user_gesture_msg_factory_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(WebPluginDelegateImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_NPAPI_WEBPLUGIN_DELEGATE_IMPL_H_