Added support to trace_event for passing static string arguments without copy

webkit/glue/webkitclient_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/webkitclient_impl.h"
 
 #if defined(OS_LINUX)
 #include <malloc.h>
 #endif
 
@@ skipping 272 matching lines @@
   // 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);
 }
 
 void WebKitClientImpl::traceEventBegin(const char* name, void* id,
                                        const char* extra) {
-  TRACE_EVENT_BEGIN_ETW(name, id, extra);
+  TRACE_EVENT_BEGIN_ETW(name, id, std::string(extra));
 }
 
 void WebKitClientImpl::traceEventEnd(const char* name, void* id,
                                      const char* extra) {
-  TRACE_EVENT_END_ETW(name, id, extra);
+  TRACE_EVENT_END_ETW(name, id, std::string(extra));
 }
 
 namespace {
 
 WebData loadAudioSpatializationResource(const char* name) {
 #ifdef IDR_AUDIO_SPATIALIZATION_T000_P000
   const size_t kExpectedSpatializationNameLength = 31;
   if (strlen(name) != kExpectedSpatializationNameLength) {
     return WebData();
   }
@@ skipping 340 matching lines @@
 
 void WebKitClientImpl::ResumeSharedTimer() {
   // The shared timer may have fired or been adjusted while we were suspended.
   if (--shared_timer_suspended_ == 0 && !shared_timer_.IsRunning()) {
     setSharedTimerFireInterval(
         monotonicallyIncreasingTime() - shared_timer_fire_time_);
   }
 }
 
 }  // namespace webkit_glue