Remove dependencies of V8 on cpu-profiler is_profiling.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index a1d0e887dbe21d512a9115520ad9cd423ea8be6e..762c88a64e74f8ff5f175744cc2a330f4533fe66 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -916,6 +916,9 @@ class Isolate {
 
   Debug* debug() { return debug_; }
 
+  void set_profiling(bool value) { is_profiling_ = value; }

[Yang, 2016/06/08 07:45:18]

You could declare this field including accessors by adding an entry to
ISOLATE_INIT_LIST macro.

[alph, 2016/06/08 18:38:42]

Thanks. Done.

+  bool is_profiling() const { return is_profiling_; }
+  bool* is_profiling_address() { return &is_profiling_; }

[Yang, 2016/06/08 07:45:18]

You could add an entry to FOR_EACH_ISOLATE_ADDRESS_NAME macro for this.

[alph, 2016/06/08 18:38:42]

It doesn't seem I need this as the entry has a dedicated accessor function in
ExternalReference class.

   CpuProfiler* cpu_profiler() const { return cpu_profiler_; }
   HeapProfiler* heap_profiler() const { return heap_profiler_; }
 
@@ -1332,6 +1335,9 @@ class Isolate {
   JSObject::SpillInformation js_spill_information_;
 #endif
 
+  // True if the isolate is being profiled.
+  // Causes collection of extra compile info.
+  bool is_profiling_;
   Debug* debug_;
   CpuProfiler* cpu_profiler_;
   HeapProfiler* heap_profiler_;