Really fix ARM build (this time verified locally.)

src/cpu-profiler.h

 // Copyright 2010 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 93 matching lines @@
 class TickSampleEventRecord {
  public:
   // In memory, the first machine word of a TickSampleEventRecord will be the
   // first entry of TickSample, that is -- a program counter field.
   // TickSample is put first, because 'order' can become equal to
   // SamplingCircularQueue::kClear, while program counter can't.
   TickSample sample;
   unsigned order;
 
 #if defined(__GNUC__) && (__GNUC__ < 4)
-  // Added to avoid 'all member functions in class are private' error.
+  // Added to avoid 'all member functions in class are private' warning.
   INLINE(unsigned get_order() const) { return order; }
+  // Added to avoid 'class only defines private constructors and
+  // has no friends' warning.
+  friend class TickSampleEventRecordFriend;
 #endif
  private:
   // Disable instantiation.
   TickSampleEventRecord();
 
   DISALLOW_COPY_AND_ASSIGN(TickSampleEventRecord);
 };
 
 
 // This class implements both the profile events processor thread and
@@ skipping 49 matching lines @@
   bool running_;
   CircularQueue<CodeEventsContainer> events_buffer_;
   SamplingCircularQueue ticks_buffer_;
   unsigned enqueue_order_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_CPU_PROFILER_H_