Disable PPAPITest.DeviceContext2D on Win as well. It failed on  multiple win bots:
Disable PPAPITest.DeviceContext2D on Win as well. It failed on 
multiple win bots:

PPAPITest.DeviceContext2D: 
C:\b\slave\chromium-rel-xp\build\src\chrome\test\ui\ppapi_uitest.cc(69): error: Value of: escaped_value.c_str()
  Actual: "Test case could not initialize"
  Expected: "PASS"

BUG=None
TEST=UI test passes on Windows
TBR=brettw

Review URL: http://codereview.chromium.org/2755004

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@49435 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser