[Oilpan]: Moving the FontSelector/FontCacheClient, CSSSegmentedFontFace, and FontFaceCache to the o…

Source/platform/fonts/FontCacheClient.h

Index: Source/platform/fonts/FontCacheClient.h
diff --git a/Source/platform/fonts/FontCacheClient.h b/Source/platform/fonts/FontCacheClient.h
index 4e43b8c72cf93e9d6f51f68098d434a9d97444ce..c6b9bdf3e1b1b45cba4c47ac98ba9702b0d4a4ee 100644
--- a/Source/platform/fonts/FontCacheClient.h
+++ b/Source/platform/fonts/FontCacheClient.h
@@ -32,15 +32,17 @@
 #define FontCacheClient_h
 
 #include "platform/PlatformExport.h"
+#include "platform/heap/Handle.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class PLATFORM_EXPORT FontCacheClient : public RefCounted<FontCacheClient> {
+class PLATFORM_EXPORT FontCacheClient : public RefCountedWillBeGarbageCollectedFinalized<FontCacheClient> {
 public:
     virtual ~FontCacheClient() { }
 
     virtual void fontCacheInvalidated() = 0;
+    virtual void trace(Visitor*) = 0;
 };
 
 } // namespace WebCore