V8: Add API to report OOM to embedder.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index c3c7743dfdde5952ceef702e8e0d32d988480242..853adc01152fe7c2919b40ef29cf23df3290d55a 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -5012,6 +5012,7 @@ class V8_EXPORT ResourceConstraints {
 
 typedef void (*FatalErrorCallback)(const char* location, const char* message);
 
+typedef void (*OOMErrorCallback)(const char* location, bool is_heap_oom);
 
 typedef void (*MessageCallback)(Local<Message> message, Local<Value> error);
 
@@ -6326,6 +6327,9 @@ class V8_EXPORT Isolate {
   /** Set the callback to invoke in case of fatal errors. */
   void SetFatalErrorHandler(FatalErrorCallback that);
 
+  /** Set the callback to invoke in case of OOM errors. */
+  void SetOOMErrorHandler(OOMErrorCallback that);
+
   /**
    * Set the callback to invoke to check if code generation from
    * strings should be allowed.
@@ -8872,6 +8876,10 @@ void V8::SetFatalErrorHandler(FatalErrorCallback callback) {
   isolate->SetFatalErrorHandler(callback);
 }
 
+void V8::SetOOMErrorHandler(OOMErrorCallback callback) {
+  Isolate* isolate = Isolate::GetCurrent();
+  isolate->SetOOMErrorHandler(callback);
+}
 
 void V8::RemoveGCPrologueCallback(GCCallback callback) {
   Isolate* isolate = Isolate::GetCurrent();