Allow tracing in third_party libraries

webkit/glue/webkitplatformsupport_impl.cc

 // Copyright (c) 2011 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 "webkit/glue/webkitplatformsupport_impl.h"
 
 #if defined(OS_LINUX)
 #include <malloc.h>
 #endif
 
@@ skipping 274 matching lines @@
   // Copied from histogram macro, but without the static variable caching
   // the histogram because name is dynamic.
   base::Histogram* counter =
       base::LinearHistogram::FactoryGet(name, 1, boundary_value,
           boundary_value + 1, base::Histogram::kUmaTargetedHistogramFlag);
   DCHECK_EQ(name, counter->histogram_name());
   counter->Add(sample);
 }
 
 bool WebKitPlatformSupportImpl::isTraceEventEnabled() const {
-  return base::debug::TraceLog::GetCategory("webkit")->enabled;
+  return !!*base::debug::TraceLog::GetCategoryEnabled("webkit");
 }
 
 void WebKitPlatformSupportImpl::traceEventBegin(const char* name, void* id,
                                                 const char* extra) {
   TRACE_EVENT_BEGIN_ETW(name, id, extra);
 }
 
 void WebKitPlatformSupportImpl::traceEventEnd(const char* name, void* id,
                                               const char* extra) {
   TRACE_EVENT_END_ETW(name, id, extra);
@@ skipping 387 matching lines @@
   worker_task_runner->OnWorkerRunLoopStarted(runLoop);
 }
 
 void WebKitPlatformSupportImpl::didStopWorkerRunLoop(
     const WebKit::WebWorkerRunLoop& runLoop) {
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStopped(runLoop);
 }
 
 }  // namespace webkit_glue