[Isolates] Pass isolate to VMState constructor.

src/cpu-profiler.h

Index: src/cpu-profiler.h
diff --git a/src/cpu-profiler.h b/src/cpu-profiler.h
index ecf774ce6e35fff37600bfbf94f74b253cece0d9..9d54984f9520b4d5e7cd2f140deb1a16ffe3621f 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -226,6 +226,8 @@ class ProfilerEventsProcessor : public Thread {
 namespace v8 {
 namespace internal {
 
+
+// TODO(isolates): isolatify this class.
 class CpuProfiler {
  public:
   static void Setup();
@@ -270,7 +272,10 @@ class CpuProfiler {
   static void SetterCallbackEvent(String* name, Address entry_point);
 
   static INLINE(bool is_profiling()) {
-    Isolate* isolate = Isolate::Current();
+    return is_profiling(Isolate::Current());
+  }
+
+  static INLINE(bool is_profiling(Isolate* isolate)) {
     return isolate->cpu_profiler() != NULL &&
            isolate->cpu_profiler()->processor_ != NULL;
   }