Remove unused trace sampling states

sky/engine/platform/EventTracer.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 22 matching lines @@
 
 #include <stdio.h>
 #include "sky/engine/public/platform/Platform.h"
 #include "sky/engine/public/platform/WebConvertableToTraceFormat.h"
 #include "sky/engine/wtf/Assertions.h"
 
 namespace blink {
 
 COMPILE_ASSERT(sizeof(blink::Platform::TraceEventHandle) == sizeof(TraceEvent::TraceEventHandle), TraceEventHandle_types_must_be_compatible);
 
-// The dummy variable is needed to avoid a crash when someone updates the state variables
-// before EventTracer::initialize() is called.
-long dummyTraceSamplingState = 0;
-long* traceSamplingState[3] = {&dummyTraceSamplingState, &dummyTraceSamplingState, &dummyTraceSamplingState };
-
-void EventTracer::initialize()
-{
-    // current() might not exist in unit tests.
-    if (!blink::Platform::current())
-        return;
-
-    traceSamplingState[0] = blink::Platform::current()->getTraceSamplingState(0);
-    // FIXME: traceSamplingState[0] can be 0 in split-dll build. http://crbug.com/256965
-    if (!traceSamplingState[0])
-        traceSamplingState[0] = &dummyTraceSamplingState;
-    traceSamplingState[1] = blink::Platform::current()->getTraceSamplingState(1);
-    if (!traceSamplingState[1])
-        traceSamplingState[1] = &dummyTraceSamplingState;
-    traceSamplingState[2] = blink::Platform::current()->getTraceSamplingState(2);
-    if (!traceSamplingState[2])
-        traceSamplingState[2] = &dummyTraceSamplingState;
-}
-
 const unsigned char* EventTracer::getTraceCategoryEnabledFlag(const char* categoryName)
 {
     static const char* dummyCategoryEnabledFlag = "*";
     // current() might not exist in unit tests.
     if (!blink::Platform::current())
         return reinterpret_cast<const unsigned char*>(dummyCategoryEnabledFlag);
 
     return blink::Platform::current()->getTraceCategoryEnabledFlag(categoryName);
 }
 
@@ skipping 22 matching lines @@
 {
     return blink::Platform::current()->addTraceEvent(phase, categoryEnabledFlag, name, id, numArgs, argNames, argTypes, argValues, 0, flags);
 }
 
 void EventTracer::updateTraceEventDuration(const unsigned char* categoryEnabledFlag, const char* name, TraceEvent::TraceEventHandle handle)
 {
     blink::Platform::current()->updateTraceEventDuration(categoryEnabledFlag, name, handle);
 }
 
 } // namespace blink