v8: Interrupts must not mask stack overflow.

Backport of https://codereview.chromium.org/339883002

Author: indutny

deps/v8/src/isolate.h

@@ -1392,14 +1392,9 @@ class StackLimitCheck BASE_EMBEDDED {
  public:
   explicit StackLimitCheck(Isolate* isolate) : isolate_(isolate) { }
 
-  bool HasOverflowed() const {
+  inline bool HasOverflowed() const {
     StackGuard* stack_guard = isolate_->stack_guard();
-    // Stack has overflowed in C++ code only if stack pointer exceeds the C++
-    // stack guard and the limits are not set to interrupt values.
-    // TODO(214): Stack overflows are ignored if a interrupt is pending. This
-    // code should probably always use the initial C++ limit.
-    return (reinterpret_cast<uintptr_t>(this) < stack_guard->climit()) &&
-           stack_guard->IsStackOverflow();
+    return reinterpret_cast<uintptr_t>(this) < stack_guard->real_climit();
   }
  private:
   Isolate* isolate_;