Switch profiler from isolates to threads

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
diff --git a/runtime/vm/isolate.h b/runtime/vm/isolate.h
index 908e64171e16736a7d3ffc659865359589f4cf6c..f55a2fc78faf8853314aac6fa77d452a362ec81b 100644
--- a/runtime/vm/isolate.h
+++ b/runtime/vm/isolate.h
@@ -307,6 +307,10 @@ class Isolate : public BaseIsolate {
 
   Mutex* mutex() const { return mutex_; }
 
+  bool HasDebugger() const {
+    return debugger_ != NULL;
+  }
+
   Debugger* debugger() const {
     ASSERT(debugger_ != NULL);
     return debugger_;
@@ -550,27 +554,12 @@ class Isolate : public BaseIsolate {
     return defer_finalization_count_ == 0;
   }
 
-  Mutex* profiler_data_mutex() {
-    return &profiler_data_mutex_;
-  }
-
-  void set_profiler_data(IsolateProfilerData* profiler_data) {
-    profiler_data_ = profiler_data;
-  }
-
-  IsolateProfilerData* profiler_data() const {
-    return profiler_data_;
-  }
-
   void PrintJSON(JSONStream* stream, bool ref = true);
 
   CompilerStats* compiler_stats() {
     return compiler_stats_;
   }
 
-  // Returns the number of sampled threads.
-  intptr_t ProfileInterrupt();
-
   VMTagCounters* vm_tag_counters() {
     return &vm_tag_counters_;
   }
@@ -794,9 +783,6 @@ class Isolate : public BaseIsolate {
   // Trace buffer support.
   TraceBuffer* trace_buffer_;
 
-  IsolateProfilerData* profiler_data_;
-  Mutex profiler_data_mutex_;
-
   VMTagCounters vm_tag_counters_;
   RawGrowableObjectArray* tag_table_;