content: Split web_drag_dest_gtk.cc into chrome/ and content/ parts.

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 2244 matching lines @@
         'browser/tab_contents/tab_contents_view_gtk.cc',
         'browser/tab_contents/tab_contents_view_gtk.h',
         'browser/tab_contents/tab_contents_view_mac.h',
         'browser/tab_contents/tab_contents_view_mac.mm',
         'browser/tab_contents/tab_util.cc',
         'browser/tab_contents/tab_util.h',
         'browser/tab_contents/thumbnail_generator.cc',
         'browser/tab_contents/thumbnail_generator.h',
         'browser/tab_contents/spelling_menu_observer.cc',
         'browser/tab_contents/spelling_menu_observer.h',
+        'browser/tab_contents/web_drag_bookmark_handler_gtk.cc',
+        'browser/tab_contents/web_drag_bookmark_handler_gtk.h',
+        'browser/tab_contents/web_drag_dest_delegate_gtk.cc',
+        'browser/tab_contents/web_drag_dest_delegate_gtk.h',
         'browser/tab_contents/web_drag_dest_gtk.cc',
         'browser/tab_contents/web_drag_dest_gtk.h',
         'browser/tab_contents/web_drag_source_win.cc',
         'browser/tab_contents/web_drag_source_win.h',
         'browser/tab_contents/web_drag_utils_win.cc',
         'browser/tab_contents/web_drag_utils_win.h',
         'browser/tab_contents/web_drop_target_win.cc',
         'browser/tab_contents/web_drop_target_win.h',
         'browser/tabs/default_tab_handler.cc',
         'browser/tabs/default_tab_handler.h',
@@ skipping 2815 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/history/in_memory_url_index_cache.proto' ],
       'variables': {
         'proto_in_dir': 'browser/history',
         'proto_out_dir': 'chrome/browser/history',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }