clean up a couple of parameters in the tracing interface

include/utils/SkEventTracer.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkEventTracer_DEFINED
 #define SkEventTracer_DEFINED
 
@@ skipping 31 matching lines @@
     // These values must be in sync with macro values in trace_event.h in chromium.
     enum CategoryGroupEnabledFlags {
         // Category group enabled for the recording mode.
         kEnabledForRecording_CategoryGroupEnabledFlags = 1 << 0,
         // Category group enabled for the monitoring mode.
         kEnabledForMonitoring_CategoryGroupEnabledFlags = 1 << 1,
         // Category group enabled by SetEventCallbackEnabled().
         kEnabledForEventCallback_CategoryGroupEnabledFlags = 1 << 2,
     };
 
-    virtual const unsigned char* getCategoryGroupEnabled(const char* name) = 0;
+    virtual const uint8_t* getCategoryGroupEnabled(const char* name) = 0;
     virtual const char* getCategoryGroupName(
       const uint8_t* category_group_enabled) = 0;
 
     virtual SkEventTracer::Handle
         addTraceEvent(char phase,
                       const uint8_t* categoryEnabledFlag,
                       const char* name,
                       uint64_t id,
                       int32_t numArgs,
                       const char** argNames,
                       const uint8_t* argTypes,
                       const uint64_t* argValues,
                       uint8_t flags) = 0;
 
     virtual void
         updateTraceEventDuration(const uint8_t* categoryEnabledFlag,
                                  const char* name,
-                                 SkEventTracer::Handle) = 0;
+                                 SkEventTracer::Handle handle) = 0;
 private:
     static SkEventTracer *gInstance;
 };
 
 #endif // SkEventTracer_DEFINED