Merge r10103 to the 3.4 branch. This increases the tick interval on android.

src/log.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 274 matching lines @@
   void LogCompiledFunctions();
   // Logs all accessor callbacks found in the heap.
   void LogAccessorCallbacks();
   // Used for logging stubs found in the snapshot.
   void LogCodeObjects();
 
   // Converts tag to a corresponding NATIVE_... if the script is native.
   INLINE(static LogEventsAndTags ToNativeByScript(LogEventsAndTags, Script*));
 
   // Profiler's sampling interval (in milliseconds).
+#if defined(ANDROID)
+  // Phones and tablets have processors that are much slower than desktop
+  // and laptop computers for which current heuristics are tuned.
+  static const int kSamplingIntervalMs = 5;
+#else
   static const int kSamplingIntervalMs = 1;
+#endif
 
   // Callback from Log, stops profiling in case of insufficient resources.
   void LogFailure();
 
  private:
   class NameBuffer;
   class NameMap;
 
   Logger();
   ~Logger();
@@ skipping 150 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_