Fix "unused variable" warnings.

extensions/renderer/request_sender.cc

 // Copyright 2014 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 "extensions/renderer/request_sender.h"
 
 #include "base/values.h"
 #include "content/public/renderer/render_frame.h"
 #include "extensions/common/extension_messages.h"
-#include "extensions/renderer/dispatcher.h"
 #include "extensions/renderer/script_context.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebScopedUserGesture.h"
 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
 #include "third_party/WebKit/public/web/WebUserGestureToken.h"
 
 namespace extensions {
 
 // Contains info relevant to a pending API request.
@@ skipping 15 matching lines @@
       tab_id_(tab_id),
       previous_tab_id_(request_sender->source_tab_id_) {
   request_sender_->source_tab_id_ = tab_id;
 }
 
 RequestSender::ScopedTabID::~ScopedTabID() {
   DCHECK_EQ(tab_id_, request_sender_->source_tab_id_);
   request_sender_->source_tab_id_ = previous_tab_id_;
 }
 
-RequestSender::RequestSender(Dispatcher* dispatcher)
-    : dispatcher_(dispatcher), source_tab_id_(-1) {}
+RequestSender::RequestSender() : source_tab_id_(-1) {}
 
 RequestSender::~RequestSender() {}
 
 void RequestSender::InsertRequest(int request_id,
                                   PendingRequest* pending_request) {
   DCHECK_EQ(0u, pending_requests_.count(request_id));
   pending_requests_[request_id].reset(pending_request);
 }
 
 linked_ptr<PendingRequest> RequestSender::RemoveRequest(int request_id) {
@@ skipping 76 matching lines @@
   for (PendingRequestMap::iterator it = pending_requests_.begin();
        it != pending_requests_.end();) {
     if (it->second->source == source)
       pending_requests_.erase(it++);
     else
       ++it;
   }
 }
 
 }  // namespace extensions