Revert 108752 - Support tracking of IPC messages as tasks in profiler

base/location.h

 // 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.
 
 #ifndef BASE_LOCATION_H_
 #define BASE_LOCATION_H_
 
 #include <string>
 
 #include "base/base_export.h"
@@ skipping 54 matching lines @@
  private:
   const char* function_name_;
   const char* file_name_;
   int line_number_;
   const void* program_counter_;
 };
 
 BASE_EXPORT const void* GetProgramCounter();
 
 // Define a macro to record the current source location.
-#define FROM_HERE FROM_HERE_WITH_EXPLICIT_FUNCTION(__FUNCTION__)
-
-#define FROM_HERE_WITH_EXPLICIT_FUNCTION(function_name)                        \
-    ::tracked_objects::Location(function_name,                                 \
-                                __FILE__,                                      \
-                                __LINE__,                                      \
-                                ::tracked_objects::GetProgramCounter())
+#define FROM_HERE tracked_objects::Location(                                   \
+    __FUNCTION__,                                                              \
+    __FILE__,                                                                  \
+    __LINE__,                                                                  \
+    tracked_objects::GetProgramCounter())                                      \
 
 }  // namespace tracked_objects
 
 #endif  // BASE_LOCATION_H_