Remove SlidingStateWindow and related code.

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 56 matching lines @@
 // 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 LogMessageBuilder;
 class Profiler;
 class Semaphore;
-class SlidingStateWindow;
 class Ticker;
 class Isolate;
 
 #undef LOG
 #define LOG(isolate, Call)                          \
   do {                                              \
     v8::internal::Logger* logger =                  \
         (isolate)->logger();                        \
     if (logger->is_logging())                       \
       logger->Call;                                 \
@@ skipping 80 matching lines @@
   void EnsureTickerStarted();
   void EnsureTickerStopped();
 
   Sampler* sampler();
 
   // Frees resources acquired in SetUp.
   // When a temporary file is used for the log, returns its stream descriptor,
   // leaving the file open.
   FILE* TearDown();
 
-  // Enable the computation of a sliding window of states.
-  void EnableSlidingStateWindow();
-
   // Emits an event with a string value -> (name, value).
   void StringEvent(const char* name, const char* value);
 
   // Emits an event with an int value -> (name, value).
   void IntEvent(const char* name, int value);
   void IntPtrTEvent(const char* name, intptr_t value);
 
   // Emits an event with an handle value -> (name, location).
   void HandleEvent(const char* name, Object** location);
 
@@ skipping 235 matching lines @@
   bool IsProfilerSamplerActive();
 
   // The sampler used by the profiler and the sliding state window.
   Ticker* ticker_;
 
   // 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* const* log_events_;
 
   // Internal implementation classes with access to
   // private members.
   friend class EventLog;
   friend class Isolate;
   friend class LogMessageBuilder;
   friend class TimeLog;
   friend class Profiler;
-  friend class SlidingStateWindow;
   friend class StackTracer;
   friend class VMState;
 
   friend class LoggerTestHelper;
 
 
   int logging_nesting_;
   int cpu_profiler_nesting_;
 
   Log* log_;
@@ skipping 64 matching lines @@
 // Class that extracts stack trace, used for profiling.
 class StackTracer : public AllStatic {
  public:
   static void Trace(Isolate* isolate, TickSample* sample);
 };
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_