Add basic C++ implementation of CPU profiler.

src/platform.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 511 matching lines @@
         fp(NULL),
         function(NULL),
         state(OTHER),
         frames_count(0) {}
   Address pc;  // Instruction pointer.
   Address sp;  // Stack pointer.
   Address fp;  // Frame pointer.
   Address function;  // The last called JS function.
   StateTag state;  // The state of the VM.
   static const int kMaxFramesCount = 100;
-  EmbeddedVector<Address, kMaxFramesCount> stack;  // Call stack.
+  Address stack[kMaxFramesCount];  // Call stack.
   int frames_count;  // Number of captured frames.
 };
 
 class Sampler {
  public:
   // Initialize sampler.
   explicit Sampler(int interval, bool profiling);
   virtual ~Sampler();
 
   // Performs stack sampling.
@@ skipping 21 matching lines @@
   bool active_;
   PlatformData* data_;  // Platform specific data.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_