Fix Aura build when toolkit_views==0

This fixes Aura builds (such as Ozone) which compile with use_aura=1 and
toolkit_views=0.

TBR=ben@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/250923014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266641 0039d316-1c4b-4281-b951-d872f2087c98

ui/base/ui_base.gyp

@@ -389,6 +389,13 @@
                 ['exclude', '^dragdrop/drag_utils.cc'],
                 ['exclude', '^dragdrop/drag_utils.h'],
               ],
+            }, {
+              'sources/': [
+                ['include', '^dragdrop/os_exchange_data.cc'],
+                ['include', '^dragdrop/os_exchange_data.h'],
+                ['include', '^nine_image_painter_factory.cc'],
+                ['include', '^nine_image_painter_factory.h'],
+              ],
             }],
           ],
         }],

ui/gfx/gfx.gyp

@@ -348,7 +348,7 @@
             ],
           },
         }],
-        ['toolkit_views==0', {
+        ['use_aura==0', {
           'sources!': [
             'nine_image_painter.cc',
             'nine_image_painter.h',