Support C and Objective-C in jumbo base scripts.

third_party/WebKit/Source/core/css/BUILD.gn

Index: third_party/WebKit/Source/core/css/BUILD.gn
diff --git a/third_party/WebKit/Source/core/css/BUILD.gn b/third_party/WebKit/Source/core/css/BUILD.gn
index 61763c60b84f07a93ebacefeba1137d2bb478c0d..4d6f7631b7c04f5777698736a2f7e765d1d95b16 100644
--- a/third_party/WebKit/Source/core/css/BUILD.gn
+++ b/third_party/WebKit/Source/core/css/BUILD.gn
@@ -592,6 +592,18 @@ blink_core_sources("css") {
     "resolver/ViewportStyleResolver.h",
   ]
 
+  if (is_win) {
+    jumbo_excluded_sources = [
+      # For some reason
+      # using CSSCursorImageValue = cssvalue::CSSCursorImageValue;
+      # makes VS confused. Afterwards it doesn't know whether to use
+      # blink::cssvalue or blink directly. Maybe there is a "using
+      # cssvalue" somewhere?
+      "properties/CSSPropertyAPIContent.cpp",
+      "properties/CSSPropertyAPICursor.cpp",
+    ]
+  }
+
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",