Make WebTraceLocation be an alias of tracked_objects::Location

third_party/WebKit/Source/platform/exported/WebTraceLocation.cpp

 // 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 "public/platform/WebTraceLocation.h"
 
+#include "wtf/Compiler.h"
+#include "wtf/build_config.h"
+
+#if OS(WIN)
+#include <intrin.h>
+#endif
+
 namespace blink {
 
 WebTraceLocation::WebTraceLocation()
     : m_functionName("unknown")
     , m_fileName("unknown")
+    , m_lineNumber(-1)
+    , m_programCounter(nullptr)
 { }
 
-WebTraceLocation::WebTraceLocation(const char* functionName, const char* fileName)
+WebTraceLocation::WebTraceLocation(const char* functionName, const char* fileName, int lineNumber, const void* programCounter)
     : m_functionName(functionName)
     , m_fileName(fileName)
+    , m_lineNumber(lineNumber)
+    , m_programCounter(programCounter)
 { }
 
 const char* WebTraceLocation::functionName() const
 {
     return m_functionName;
 }
 
 const char* WebTraceLocation::fileName() const
 {
     return m_fileName;
 }
 
+int WebTraceLocation::lineNumber() const
+{
+    return m_lineNumber;
+}
+
+const void* WebTraceLocation::programCounter() const
+{
+    return m_programCounter;
+}
+
+#if COMPILER(MSVC)
+__declspec(noinline)
+#endif
+const void* WebTraceLocation::getProgramCounter()
+{
+#if COMPILER(MSVC)
+    return _ReturnAddress();
+#elif COMPILER(GCC) && !OS(NACL)
+    return __builtin_extract_return_addr(__builtin_return_address(0));
+#else
+    return nullptr;
+#endif
+}
+
 } // namespace blink