Deinline even more destructors.

chrome/browser/dom_ui/dom_ui_screenshot_source.cc

 // Copyright (c) 2009 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"
@@ skipping 97 matching lines @@
     current_screenshot_.clear();
 }
 
 DOMUIScreenshotSource::~DOMUIScreenshotSource() {}
 
 void DOMUIScreenshotSource::StartDataRequest(const std::string& path,
                                             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";
+}