Add an API to report debugName in GraphicsLayer

public/platform/WebLayerClient.h

Index: public/platform/WebLayerClient.h
diff --git a/public/platform/WebStorageQuotaType.h b/public/platform/WebLayerClient.h
similarity index 88%
copy from public/platform/WebStorageQuotaType.h
copy to public/platform/WebLayerClient.h
index aff1cf9adeaf642ca53d00c3e85260841efb7289..aa110f1fadf04dda05c979822ad0f9919bd432a0 100644
--- a/public/platform/WebStorageQuotaType.h
+++ b/public/platform/WebLayerClient.h
@@ -28,16 +28,20 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebStorageQuotaType_h
-#define WebStorageQuotaType_h
+#ifndef WebLayerClient_h
+#define WebLayerClient_h
 
 namespace WebKit {
 
-enum WebStorageQuotaType {
-    WebStorageQuotaTypeTemporary,
-    WebStorageQuotaTypePersistent,
+class WebLayerClient {
+public:
+    virtual WebString debugName(WebLayer*) = 0;
+
+protected:
+    virtual ~WebLayerClient() { }
 };
 
 } // namespace WebKit
 
-#endif // WebStorageQuotaType_h
+#endif // WebLayerClient_h
+