Add methods to allow resuming execution after calling TerminateExecution().

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 724c8433b4d0ecc1760030baf15c8a617213e375..64928abb108c6e104feb440873cd5fc81c847b59 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -1909,7 +1909,8 @@ v8::TryCatch::TryCatch()
       is_verbose_(false),
       can_continue_(true),
       capture_message_(true),
-      rethrow_(false) {
+      rethrow_(false),
+      has_terminated_(false) {
   isolate_->RegisterTryCatchHandler(this);
 }
 
@@ -1937,6 +1938,11 @@ bool v8::TryCatch::CanContinue() const {
 }
 
 
+bool v8::TryCatch::HasTerminated() const {
+  return has_terminated_;
+}
+
+
 v8::Handle<v8::Value> v8::TryCatch::ReThrow() {
   if (!HasCaught()) return v8::Local<v8::Value>();
   rethrow_ = true;
@@ -6116,6 +6122,12 @@ bool V8::IsExecutionTerminating(Isolate* isolate) {
 }
 
 
+void V8::CancelTerminateExecution(Isolate* isolate) {
+  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  i_isolate->stack_guard()->CancelTerminateExecution();
+}
+
+
 Isolate* Isolate::GetCurrent() {
   i::Isolate* isolate = i::Isolate::UncheckedCurrent();
   return reinterpret_cast<Isolate*>(isolate);