Introduce v8::CpuProfiler::New and v8::CpuProfiler::Dispose API.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 54baa53b6c280f614e60a2937aa20d64567d0af3..74ec944c194da43429a9e7d7df30b0a98ee8bf29 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -921,7 +921,6 @@ class Isolate {
   CodeEventDispatcher* code_event_dispatcher() const {
     return code_event_dispatcher_.get();
   }
-  CpuProfiler* cpu_profiler() const { return cpu_profiler_; }
   HeapProfiler* heap_profiler() const { return heap_profiler_; }
 
 #ifdef DEBUG
@@ -1264,6 +1263,10 @@ class Isolate {
     return "";
   }
 
+  // TODO(alph): Remove along with the deprecated GetCpuProfiler().
+  friend v8::CpuProfiler* v8::Isolate::GetCpuProfiler();
+  CpuProfiler* cpu_profiler() const { return cpu_profiler_; }
+
   base::Atomic32 id_;
   EntryStackItem* entry_stack_;
   int stack_trace_nesting_level_;