Cleanup dom_ui_screenshot_source.

chrome/browser/dom_ui/dom_ui_screenshot_source.cc

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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 "chrome/browser/dom_ui/dom_ui_screenshot_source.h"
 
-#include "base/callback.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/ref_counted_memory.h"
+#include "base/synchronization/waitable_event.h"
 #include "base/task.h"
-#include "base/threading/thread.h"
-#include "base/synchronization/waitable_event.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/url_constants.h"
-#include "gfx/codec/jpeg_codec.h"
-#include "googleurl/src/gurl.h"
-#include "third_party/skia/include/core/SkBitmap.h"
 
 static const char kCurrentScreenshot[] = "current";
 #if defined(OS_CHROMEOS)
 static const char kSavedScreenshots[] = "saved/";
 #endif
 
 static const char kScreenshotsRelativePath[] = "/Screenshots/";
 
 #if defined(OS_CHROMEOS)
 // Read the file from the screenshots directory into the read_bytes vector.
@@ skipping 84 matching lines @@
                                             bool is_off_the_record,
                                             int request_id) {
   SendResponse(request_id, new RefCountedBytes(GetScreenshot(path)));
 }
 
 std::string DOMUIScreenshotSource::GetMimeType(const std::string&) const {
   // We need to explicitly return a mime type, otherwise if the user tries to
   // drag the image they get no extension.
   return "image/png";
 }