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

content/renderer/pepper/pepper_plugin_instance_impl.cc

 // 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.
 
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 3102 matching lines @@
     WebString result = container_->executeScriptURL(gurl, false);
     return result.isNull() ? PP_ERROR_FAILED : PP_OK;
   }
 
   // Only GETs and POSTs are supported.
   if (web_request.httpMethod() != "GET" && web_request.httpMethod() != "POST")
     return PP_ERROR_BADARGUMENT;
 
   WebString target_str = WebString::fromUTF8(target);
   blink::WebScopedUserGesture user_gesture(CurrentUserGestureToken());
-  container_->loadFrameRequest(web_request, target_str, false, NULL);
+  container_->loadFrameRequest(web_request, target_str);
   return PP_OK;
 }
 
 int PepperPluginInstanceImpl::MakePendingFileRefRendererHost(
     const base::FilePath& path) {
   RendererPpapiHostImpl* host_impl = module_->renderer_ppapi_host();
   PepperFileRefRendererHost* file_ref_host(
       new PepperFileRefRendererHost(host_impl, pp_instance(), 0, path));
   return host_impl->GetPpapiHost()->AddPendingResourceHost(
       scoped_ptr<ppapi::host::ResourceHost>(file_ref_host));
@@ skipping 144 matching lines @@
 
 void PepperPluginInstanceImpl::RecordFlashJavaScriptUse() {
   if (initialized_ && !javascript_used_ && is_flash_plugin_) {
     javascript_used_ = true;
     RenderThread::Get()->RecordAction(
         base::UserMetricsAction("Flash.JavaScriptUsed"));
   }
 }
 
 }  // namespace content