Add an UMA metric to track whether chrome is running on a tablet.

base/base.gyp

 # 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': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 165 matching lines @@
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
               '$(SDKROOT)/System/Library/Frameworks/CoreGraphics.framework',
               '$(SDKROOT)/System/Library/Frameworks/CoreText.framework',
               '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
               '$(SDKROOT)/System/Library/Frameworks/UIKit.framework',
             ],
           },
         }],
+        ['OS == "win"', {
+          'msvs_settings': {
+            'VCLinkerTool': {
+              'DelayLoadDLLs': [
+                'powrprof.dll',
+              ],
+              'AdditionalDependencies': [
+                'powrprof.lib',
+              ],
+            },
+          },
+        }],
         ['OS != "win" and OS != "ios"', {
             'dependencies': ['../third_party/libevent/libevent.gyp:libevent'],
         },],
         ['component=="shared_library"', {
           'conditions': [
             ['OS=="win"', {
               'sources!': [
                 'debug/debug_on_start_win.cc',
               ],
             }],
@@ skipping 1255 matching lines @@
             'base_unittests.isolate',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }