rename tracing parameter to be more consistent with other methods

include/utils/SkEventTracer.h

Index: include/utils/SkEventTracer.h
diff --git a/include/utils/SkEventTracer.h b/include/utils/SkEventTracer.h
index f0e2a5580c5f317f0bf10bd68295c8de76773c47..8d9fd11f64793bae035b77af639a884ff9c2070c 100644
--- a/include/utils/SkEventTracer.h
+++ b/include/utils/SkEventTracer.h
@@ -25,7 +25,7 @@
 class SK_API SkEventTracer {
 public:
 
-    typedef uint32_t Handle;
+    typedef uint64_t Handle;
 
     static SkEventTracer* GetInstance();
 
@@ -51,7 +51,7 @@ public:
 
     virtual const uint8_t* getCategoryGroupEnabled(const char* name) = 0;
     virtual const char* getCategoryGroupName(
-      const uint8_t* category_group_enabled) = 0;
+      const uint8_t* categoryEnabledFlag) = 0;
 
     virtual SkEventTracer::Handle
         addTraceEvent(char phase,