Move the core drag&drop code for Windows to content\browser to match Mac/GTK. I've had to add tempo…

content/browser/tab_contents/web_drag_utils_win.h

Index: content/browser/tab_contents/web_drag_utils_win.h
===================================================================
--- content/browser/tab_contents/web_drag_utils_win.h	(revision 124553)
+++ content/browser/tab_contents/web_drag_utils_win.h	(working copy)
@@ -2,10 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_UTILS_WIN_H_
-#define CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_UTILS_WIN_H_
+#ifndef CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_UTILS_WIN_H_
+#define CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_UTILS_WIN_H_
 #pragma once
 
+#include "content/common/content_export.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 
 #include <windows.h>
@@ -16,9 +17,9 @@
 WebKit::WebDragOperationsMask WinDragOpMaskToWebDragOpMask(DWORD effects);
 
 DWORD WebDragOpToWinDragOp(WebKit::WebDragOperation op);
-DWORD WebDragOpMaskToWinDragOpMask(WebKit::WebDragOperationsMask ops);
+CONTENT_EXPORT DWORD WebDragOpMaskToWinDragOpMask(
+    WebKit::WebDragOperationsMask ops);
 
 }  // namespace web_drag_utils_win
 
-#endif  // CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_UTILS_WIN_H_
-
+#endif  // CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_UTILS_WIN_H_