Remove unused trace sampling states

sky/viewer/platform/platform_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sky/viewer/platform/platform_impl.h"
 
 #include <cmath>
 
 #include "base/debug/trace_event.h"
 #include "base/rand_util.h"
@@ skipping 110 matching lines @@
   error.staleCopyInCache = false;
   error.isCancellation = true;
   return error;
 }
 
 const unsigned char* PlatformImpl::getTraceCategoryEnabledFlag(
     const char* category_group) {
   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 }
 
-long* PlatformImpl::getTraceSamplingState(const unsigned thread_bucket) {
-  switch (thread_bucket) {
-    case 0:
-      return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(0));
-    case 1:
-      return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(1));
-    case 2:
-      return reinterpret_cast<long*>(&TRACE_EVENT_API_THREAD_BUCKET(2));
-    default:
-      NOTREACHED() << "Unknown thread bucket type.";
-  }
-  return NULL;
-}
-
 COMPILE_ASSERT(
     sizeof(blink::Platform::TraceEventHandle) ==
         sizeof(base::debug::TraceEventHandle),
     TraceEventHandle_types_must_be_same_size);
 
 blink::Platform::TraceEventHandle PlatformImpl::addTraceEvent(
     char phase,
     const unsigned char* category_group_enabled,
     const char* name,
     unsigned long long id,
@@ skipping 52 matching lines @@
     const unsigned char* category_group_enabled,
     const char* name,
     TraceEventHandle handle) {
   base::debug::TraceEventHandle traceEventHandle;
   memcpy(&traceEventHandle, &handle, sizeof(handle));
   TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
       category_group_enabled, name, traceEventHandle);
 }
 
 }  // namespace sky