Don't allow direct const char* trace value

Source/bindings/v8/V8ScriptRunner.cpp

 /*
  * Copyright (C) 2009 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 33 matching lines @@
 
 v8::Local<v8::Script> V8ScriptRunner::compileScript(v8::Handle<v8::String> code, const String& fileName, const TextPosition& scriptStartPosition, ScriptResource* resource, v8::Isolate* isolate, AccessControlStatus corsStatus)
 {
     // A pseudo-randomly chosen ID used to store and retrieve V8 ScriptData from
     // the ScriptResource. If the format changes, this ID should be changed too.
     static const unsigned dataTypeID = 0xECC13BD7;
 
     // Very small scripts are not worth the effort to store cached data.
     static const int minLengthForCachedData = 1024;
 
-    TRACE_EVENT1("v8", "v8.compile", "fileName", TRACE_STR_COPY(fileName.utf8().data()));
+    TRACE_EVENT1("v8", "v8.compile", "fileName", fileName.utf8());
     TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Compile");
 
     // NOTE: For compatibility with WebCore, ScriptSourceCode's line starts at
     // 1, whereas v8 starts at 0.
     v8::Handle<v8::String> name = v8String(isolate, fileName);
     v8::Handle<v8::Integer> line = v8::Integer::New(isolate, scriptStartPosition.m_line.zeroBasedInt());
     v8::Handle<v8::Integer> column = v8::Integer::New(isolate, scriptStartPosition.m_column.zeroBasedInt());
     v8::Handle<v8::Boolean> isSharedCrossOrigin = corsStatus == SharableCrossOrigin ? v8::True(isolate) : v8::False(isolate);
     v8::ScriptOrigin origin(name, line, column, isSharedCrossOrigin);
 
@@ skipping 124 matching lines @@
 {
     TRACE_EVENT0("v8", "v8.newInstance");
     TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution");
     V8RecursionScope scope(isolate, context);
     v8::Local<v8::Object> result = function->NewInstance(argc, argv);
     crashIfV8IsDead();
     return result;
 }
 
 } // namespace WebCore