Remove the ability to compile without logging and profiling

src/platform.h

 // Copyright 2011 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 579 matching lines @@
   union {
     Address tos;   // Top stack value (*sp).
     Address external_callback;
   };
   static const int kMaxFramesCount = 64;
   Address stack[kMaxFramesCount];  // Call stack.
   int frames_count : 8;  // Number of captured frames.
   bool has_external_callback : 1;
 };
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 class Sampler {
  public:
   // Initialize sampler.
   Sampler(Isolate* isolate, int interval);
   virtual ~Sampler();
 
   int interval() const { return interval_; }
 
   // Performs stack sampling.
   void SampleStack(TickSample* sample) {
@@ skipping 38 matching lines @@
   Isolate* isolate_;
   const int interval_;
   Atomic32 profiling_;
   Atomic32 active_;
   PlatformData* data_;  // Platform specific data.
   int samples_taken_;  // Counts stack samples taken.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_