Logger: extract FLAG_log_code related logging into CodeEventLogger class.

src/log.h

 // Copyright 2012 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 52 matching lines @@
 // --log-regexp implies --log.
 //
 // --logfile <filename>
 // Specify the name of the logfile, default is "v8.log".
 //
 // --prof
 // Collect statistical profiling information (ticks), default is off.  The
 // tick profiler requires code events, so --prof implies --log-code.
 
 // Forward declarations.
+class CodeEventLogger;
 class CompilationInfo;
 class CpuProfiler;
 class Isolate;
 class Log;
 class PositionsRecorder;
 class Profiler;
 class Semaphore;
 class Ticker;
 struct TickSample;
 
@@ skipping 362 matching lines @@
 
   friend class LoggerTestHelper;
 
 
   int logging_nesting_;
   int cpu_profiler_nesting_;
 
   Log* log_;
   LowLevelLogger* ll_logger_;
   JitLogger* jit_logger_;
+  CodeEventLogger* code_logger_;
 
   NameBuffer* name_buffer_;
 
   NameMap* address_to_name_map_;
 
   // Guards against multiple calls to TearDown() that can happen in some tests.
   // 'true' between SetUp() and TearDown().
   bool is_initialized_;
 
   // Support for 'incremental addresses' in compressed logs:
@@ skipping 10 matching lines @@
   int64_t epoch_;
 
   friend class CpuProfiler;
 };
 
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_