Move OSExchangeData from src/app to src/ui/base/dragdrop

BUG=none
TEST=none
TBR=brettw

Review URL: http://codereview.chromium.org/6200005

git-svn-id: http://src.chromium.org/svn/trunk/src/build@71205 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -46,7 +46,6 @@
         '../third_party/sqlite/sqlite.gyp:*',
         '../third_party/WebKit/WebKit/chromium/WebKit.gyp:*',
         '../third_party/zlib/zlib.gyp:*',
-        '../ui/ui.gyp:*',
         '../webkit/support/webkit_support.gyp:*',
         '../webkit/webkit.gyp:*',
         'util/build_util.gyp:*',