Update Windows version macros to Win 7

BUG=92941
Review URL: http://codereview.chromium.org/8004004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@102735 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/common.gypi b/build/common.gypi
index d58062d..f85d612 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -2211,8 +2211,8 @@
     ['OS=="win"', {
       'target_defaults': {
         'defines': [
-          '_WIN32_WINNT=0x0600',
-          'WINVER=0x0600',
+          '_WIN32_WINNT=0x0601',
+          'WINVER=0x0601',
           'WIN32',
           '_WINDOWS',
           'NOMINMAX',