Add use-chromium-style-naming option to Blink GC plugin.

tools/clang/blink_gc_plugin/tests/ignore_class.cpp

Index: tools/clang/blink_gc_plugin/tests/ignore_class.cpp
diff --git a/tools/clang/blink_gc_plugin/tests/ignore_class.cpp b/tools/clang/blink_gc_plugin/tests/ignore_class.cpp
index c539eb6819b62028db083f569f51d54cc9836cf3..26b0ab1b1fa44cdad4a401fbc0d825a7a07d4263 100644
--- a/tools/clang/blink_gc_plugin/tests/ignore_class.cpp
+++ b/tools/clang/blink_gc_plugin/tests/ignore_class.cpp
@@ -6,14 +6,14 @@
 
 namespace blink {
 
-void B::trace(Visitor* visitor)
+void B::Trace(Visitor* visitor)
 {
     // Class is ignored so no checking here.
 }
 
-void C::trace(Visitor* visitor)
+void C::Trace(Visitor* visitor)
 {
-    // Missing trace of m_obj.
+    // Missing Trace of m_obj.
     // Ignored base class B does not need tracing.
 }