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

tools/clang/blink_gc_plugin/tests/finalize_after_dispatch.txt

Index: tools/clang/blink_gc_plugin/tests/finalize_after_dispatch.txt
diff --git a/tools/clang/blink_gc_plugin/tests/finalize_after_dispatch.txt b/tools/clang/blink_gc_plugin/tests/finalize_after_dispatch.txt
index 8a652a4b5fd6bebef4aca86189e846dd29badbb3..0a4122bfbc106618ed6cad435dafaf028c500867 100644
--- a/tools/clang/blink_gc_plugin/tests/finalize_after_dispatch.txt
+++ b/tools/clang/blink_gc_plugin/tests/finalize_after_dispatch.txt
@@ -9,9 +9,9 @@ class NeedsDispatch : public GarbageCollectedFinalized<NeedsDispatch> {
 class NeedsFinalizedBase : public GarbageCollected<NeedsFinalizedBase> {
 ^
 ./finalize_after_dispatch.h:30:5: note: [blink-gc] User-declared finalizer declared here:
-    void finalizeGarbageCollectedObject() { };
+    void FinalizeGarbageCollectedObject() { };
     ^
 finalize_after_dispatch.cpp:30:1: warning: [blink-gc] Missing dispatch to class 'D' in manual finalize dispatch.
-void A::finalizeGarbageCollectedObject()
+void A::FinalizeGarbageCollectedObject()
 ^
 4 warnings generated.