Remove unused CodeRegion class and corresponding logging functions.

src/globals.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 128 matching lines @@
 // Forward declarations for frequently used classes
 // (sorted alphabetically)
 
 class AccessorInfo;
 class Allocation;
 class Arguments;
 class Assembler;
 class BreakableStatement;
 class Code;
 class CodeGenerator;
-class CodeRegion;
 class CodeStub;
 class Context;
 class Debug;
 class Debugger;
 class DebugInfo;
 class Descriptor;
 class DescriptorArray;
 class Expression;
 class ExternalReference;
 class FixedArray;
@@ skipping 360 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define DEFINE_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define DEFINE_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBALS_H_