Enable visual styles for content_shell.exe, so that tooltips can work when hover around an element …

content/content_shell.gypi

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'content_shell_product_name': 'Content Shell',
     # The "19" is so that sites that sniff for version think that this is
     # something reasonably current; the "77.34.5" is a hint that this isn't a
     # standard Chrome.
@@ skipping 344 matching lines @@
       'mac_bundle_resources!': [
         'shell/app/app-Info.plist',
       ],
       'xcode_settings': {
         'INFOPLIST_FILE': 'shell/app/app-Info.plist',
       },
       'msvs_settings': {
         'VCLinkerTool': {
           'SubSystem': '2',  # Set /SUBSYSTEM:WINDOWS
         },
+        'VCManifestTool': {
+          'AdditionalManifestFiles': 'shell/app/shell.exe.manifest',
+        },
       },
       'conditions': [
         ['OS=="win" and win_use_allocator_shim==1', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
         }],
         ['OS=="win"', {
           'sources': [
             'shell/app/shell.rc',
@@ skipping 320 matching lines @@
             'native_lib_target': 'libcontent_shell_content_view',
             'additional_input_paths': ['<(PRODUCT_DIR)/content_shell/assets/content_shell.pak'],
             'asset_location': '<(ant_build_out)/content_shell/assets',
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
       ],
     }],  # OS=="android"
   ]
 }