[Isolates] Moving TranscendentalCache to Isolate.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 21e1e7a97483b3a49c191726198ded2d74370d0d..ab18849ef6de63952af2eb975a3c3cb106492bee 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -85,6 +85,11 @@ class Isolate {
   StackGuard* stack_guard() { return &stack_guard_; }
   Heap* heap() { return &heap_; }
   StubCache* stub_cache() { return stub_cache_; }
+
+  TranscendentalCache* transcendental_cache() const {
+    return transcendental_cache_;
+  }
+
   v8::ImplementationUtilities::HandleScopeData* handle_scope_data() {
     return &handle_scope_data_;
   }
@@ -126,6 +131,7 @@ class Isolate {
   Heap heap_;
   StackGuard stack_guard_;
   StubCache* stub_cache_;
+  TranscendentalCache* transcendental_cache_;
   v8::ImplementationUtilities::HandleScopeData handle_scope_data_;
   HandleScopeImplementer* handle_scope_implementer_;
   Zone zone_;