Don't compile windowed egl into gles2_conform_test_windowless

gpu/gles2_conform_support/gles2_conform_support.gyp

Index: gpu/gles2_conform_support/gles2_conform_support.gyp
diff --git a/gpu/gles2_conform_support/gles2_conform_support.gyp b/gpu/gles2_conform_support/gles2_conform_support.gyp
index cfc6cc7d34083c19c3340addd3f32e2650f6727c..6e63493586a41e2f290eeccb8459d3e5e409a754 100644
--- a/gpu/gles2_conform_support/gles2_conform_support.gyp
+++ b/gpu/gles2_conform_support/gles2_conform_support.gyp
@@ -12,17 +12,9 @@
       'native/main.cc',
     ],
    'conditions': [
-     ['OS=="linux"', {
+     ['OS=="linux" or OS=="win"', {
        'bootstrap_sources_native': [
          'native/egl_native.cc',
-         'native/egl_native_aura.cc',
-         'native/egl_native_x11.cc',
-       ],
-     }],
-     ['OS=="win"', {
-       'bootstrap_sources_native': [
-         'native/egl_native.cc',
-         'native/egl_native_win.cc',
        ],
      }],
    ],