diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index c651b7cd09ba19..062dd5f21fb275 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -5380,6 +5380,19 @@ class V8_EXPORT Isolate {
    */
   static Isolate* GetCurrent();
 
+  /**
+   * Custom callback used by embedders to help V8 determine if it should abort
+   * when it throws and no internal handler is predicted to catch the
+   * exception. If --abort-on-uncaught-exception is used on the command line,
+   * then V8 will abort if either:
+   * - no custom callback is set.
+   * - the custom callback set returns true.
+   * Otherwise, the custom callback will not be called and V8 will not abort.
+   */
+  typedef bool (*AbortOnUncaughtExceptionCallback)(Isolate*);
+  void SetAbortOnUncaughtExceptionCallback(
+      AbortOnUncaughtExceptionCallback callback);
+
   /**
    * Methods below this point require holding a lock (using Locker) in
    * a multi-threaded environment.
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index 593aea641b2bf3..a57171f8a3b1d3 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -7176,6 +7176,13 @@ void Isolate::Exit() {
 }
 
 
+void Isolate::SetAbortOnUncaughtExceptionCallback(
+    AbortOnUncaughtExceptionCallback callback) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
+  isolate->SetAbortOnUncaughtExceptionCallback(callback);
+}
+
+
 Isolate::DisallowJavascriptExecutionScope::DisallowJavascriptExecutionScope(
     Isolate* isolate,
     Isolate::DisallowJavascriptExecutionScope::OnFailure on_failure)
diff --git a/deps/v8/src/isolate.cc b/deps/v8/src/isolate.cc
index e9d526a4538925..2c83faac4fba24 100644
--- a/deps/v8/src/isolate.cc
+++ b/deps/v8/src/isolate.cc
@@ -1013,13 +1013,21 @@ Object* Isolate::Throw(Object* exception, MessageLocation* location) {
       Handle<Object> message_obj = CreateMessage(exception_handle, location);
       thread_local_top()->pending_message_obj_ = *message_obj;
 
-      // If the abort-on-uncaught-exception flag is specified, abort on any
-      // exception not caught by JavaScript, even when an external handler is
-      // present.  This flag is intended for use by JavaScript developers, so
-      // print a user-friendly stack trace (not an internal one).
+      // For any exception not caught by JavaScript, even when an external
+      // handler is present:
+      // If the abort-on-uncaught-exception flag is specified, and if the
+      // embedder didn't specify a custom uncaught exception callback,
+      // or if the custom callback determined that V8 should abort, then
+      // abort.
       if (FLAG_abort_on_uncaught_exception &&
-          PredictExceptionCatcher() != CAUGHT_BY_JAVASCRIPT) {
-        FLAG_abort_on_uncaught_exception = false;  // Prevent endless recursion.
+          PredictExceptionCatcher() != CAUGHT_BY_JAVASCRIPT &&
+          (!abort_on_uncaught_exception_callback_ ||
+           abort_on_uncaught_exception_callback_(
+               reinterpret_cast<v8::Isolate*>(this)))) {
+        // Prevent endless recursion.
+        FLAG_abort_on_uncaught_exception = false;
+        // This flag is intended for use by JavaScript developers, so
+        // print a user-friendly stack trace (not an internal one).
         PrintF(stderr, "%s\n\nFROM\n",
                MessageHandler::GetLocalizedMessage(this, message_obj).get());
         PrintCurrentStackTrace(stderr);
@@ -1612,6 +1620,12 @@ void Isolate::SetCaptureStackTraceForUncaughtExceptions(
 }
 
 
+void Isolate::SetAbortOnUncaughtExceptionCallback(
+    v8::Isolate::AbortOnUncaughtExceptionCallback callback) {
+  abort_on_uncaught_exception_callback_ = callback;
+}
+
+
 Handle<Context> Isolate::native_context() {
   return handle(context()->native_context());
 }
@@ -1782,7 +1796,8 @@ Isolate::Isolate(bool enable_serializer)
       next_unique_sfi_id_(0),
 #endif
       use_counter_callback_(NULL),
-      basic_block_profiler_(NULL) {
+      basic_block_profiler_(NULL),
+      abort_on_uncaught_exception_callback_(NULL) {
   {
     base::LockGuard<base::Mutex> lock_guard(thread_data_table_mutex_.Pointer());
     CHECK(thread_data_table_);
diff --git a/deps/v8/src/isolate.h b/deps/v8/src/isolate.h
index a67f0c7fb55c72..876a72f3273c19 100644
--- a/deps/v8/src/isolate.h
+++ b/deps/v8/src/isolate.h
@@ -690,6 +690,9 @@ class Isolate {
       int frame_limit,
       StackTrace::StackTraceOptions options);
 
+  void SetAbortOnUncaughtExceptionCallback(
+      v8::Isolate::AbortOnUncaughtExceptionCallback callback);
+
   enum PrintStackMode { kPrintStackConcise, kPrintStackVerbose };
   void PrintCurrentStackTrace(FILE* out);
   void PrintStack(StringStream* accumulator,
@@ -1363,6 +1366,9 @@ class Isolate {
 
   v8::ArrayBuffer::Allocator* array_buffer_allocator_;
 
+  v8::Isolate::AbortOnUncaughtExceptionCallback
+      abort_on_uncaught_exception_callback_;
+
   friend class ExecutionAccess;
   friend class HandleScopeImplementer;
   friend class OptimizingCompileDispatcher;
diff --git a/deps/v8/test/cctest/test-api.cc b/deps/v8/test/cctest/test-api.cc
index ad3190a7112d64..88d4aef25e23b7 100644
--- a/deps/v8/test/cctest/test-api.cc
+++ b/deps/v8/test/cctest/test-api.cc
@@ -21880,3 +21880,34 @@ TEST(CompatibleReceiverCheckOnCachedICHandler) {
       "result;\n",
       0);
 }
+
+
+static int nb_uncaught_exception_callback_calls = 0;
+
+
+bool NoAbortOnUncaughtException(v8::Isolate* isolate) {
+  ++nb_uncaught_exception_callback_calls;
+  return false;
+}
+
+
+TEST(AbortOnUncaughtExceptionNoAbort) {
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::HandleScope handle_scope(isolate);
+  v8::Handle<v8::ObjectTemplate> global_template =
+      v8::ObjectTemplate::New(isolate);
+  LocalContext env(NULL, global_template);
+
+  i::FLAG_abort_on_uncaught_exception = true;
+  isolate->SetAbortOnUncaughtExceptionCallback(NoAbortOnUncaughtException);
+
+  CompileRun("function boom() { throw new Error(\"boom\") }");
+
+  v8::Local<v8::Object> global_object = env->Global();
+  v8::Local<v8::Function> foo =
+      v8::Local<v8::Function>::Cast(global_object->Get(v8_str("boom")));
+
+  foo->Call(global_object, 0, NULL);
+
+  CHECK_EQ(1, nb_uncaught_exception_callback_calls);
+}