Run Crankshaft on a separate thread.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index f1c9b3ccfaae7843cfb1be0357ce056d105a6fb3..bf4c9fd353cdc5fe52693c6c263093825aeb4d6d 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -41,6 +41,7 @@
 #include "handles.h"
 #include "hashmap.h"
 #include "heap.h"
+#include "optimizing-compiler-thread.h"
 #include "regexp-stack.h"
 #include "runtime-profiler.h"
 #include "runtime.h"
@@ -69,6 +70,7 @@ class HeapProfiler;
 class InlineRuntimeFunctionsTable;
 class NoAllocationStringAllocator;
 class InnerPointerToCodeCache;
+class OptimizingCompilerThread;
 class PreallocatedMemoryThread;
 class RegExpStack;
 class SaveContext;
@@ -1032,6 +1034,8 @@ class Isolate {
     date_cache_ = date_cache;
   }
 
+  void queue_for_optimization(Handle<JSFunction> function);
+
  private:
   Isolate();
 
@@ -1207,6 +1211,7 @@ class Isolate {
   RegExpStack* regexp_stack_;
   DateCache* date_cache_;
   unibrow::Mapping<unibrow::Ecma262Canonicalize> interp_canonicalize_mapping_;
+  OptimizingCompilerThread* optimizing_compiler_thread_;
 
   // The garbage collector should be a little more aggressive when it knows
   // that a context was recently exited.
@@ -1257,6 +1262,7 @@ class Isolate {
 
   friend class ExecutionAccess;
   friend class IsolateInitializer;
+  friend class OptimizingCompilerThread;
   friend class ThreadManager;
   friend class Simulator;
   friend class StackGuard;