[Isolates] Convert more static data either to read-only or to per-isolate.

src/log.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 333 matching lines @@
   // When the statistical profile is active, profiler_
   // points to a Profiler, that handles collection
   // of samples.
   Profiler* profiler_;
 
   // SlidingStateWindow instance keeping a sliding window of the most
   // recent VM states.
   SlidingStateWindow* sliding_state_window_;
 
   // An array of log events names.
-  const char** log_events_;
+  const char* const* log_events_;
 
   // An instance of helper created if log compression is enabled.
   CompressionHelper* compression_helper_;
 
   // Internal implementation classes with access to
   // private members.
   friend class CompressionHelper;
   friend class EventLog;
   friend class Isolate;
   friend class LogMessageBuilder;
@@ skipping 37 matching lines @@
 // Class that extracts stack trace, used for profiling.
 class StackTracer : public AllStatic {
  public:
   static void Trace(TickSample* sample);
 };
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_