Update from https://crrev.com/320931

gpu/gles2_conform_support/native/BUILD.gn

Index: gpu/gles2_conform_support/native/BUILD.gn
diff --git a/gpu/gles2_conform_support/native/BUILD.gn b/gpu/gles2_conform_support/native/BUILD.gn
index aeaa6d2abc911672ac5a5a7982a8ccba2af4ca61..0d1c0ee04d7bddb61b9312715f73422960edea94 100644
--- a/gpu/gles2_conform_support/native/BUILD.gn
+++ b/gpu/gles2_conform_support/native/BUILD.gn
@@ -7,6 +7,7 @@ source_set("native") {
   output_name = "egl_main_native"
   sources = [
     "egl_native.cc",
+    "egl_native_win.cc",
     "main.cc",
   ]
   defines = [
@@ -26,9 +27,6 @@ source_set("native") {
       "egl_native_x11.cc",
     ]
   }
-  if (is_win) {
-    sources += [ "egl_native_win.cc" ]
-  }
 }
 
 # GYP version: gpu/gles2_conform_support/gles2_conform_support.gyp:egl_main_windowless
@@ -36,6 +34,7 @@ source_set("windowless") {
   output_name = "egl_main_windowless"
   sources = [
     "egl_native.cc",
+    "egl_native_win.cc",
     "egl_native_windowless.cc",
     "main.cc",
   ]
@@ -56,7 +55,4 @@ source_set("windowless") {
       "egl_native_x11.cc",
     ]
   }
-  if (is_win) {
-    sources += [ "egl_native_win.cc" ]
-  }
 }