Throw exception on invalid string length instead of OOM.

src/uri.h

Index: src/uri.h
diff --git a/src/uri.h b/src/uri.h
index ee1baeb5129fbd9a30aa8ea924ebee4da7fd61cc..81ec0c58cff93c4d896b97f5b83e64e78a5e96e8 100644
--- a/src/uri.h
+++ b/src/uri.h
@@ -264,7 +264,8 @@ Handle<String> URIEscape::Escape(Isolate* isolate, Handle<String> string) {
       // We don't allow strings that are longer than a maximal length.
       ASSERT(String::kMaxLength < 0x7fffffff - 6);  // Cannot overflow.
       if (escaped_length > String::kMaxLength) {
-        isolate->context()->mark_out_of_memory();
+        AllowHeapAllocation allocate_error_and_return;
+        isolate->ThrowInvalidStringLength();
         return Handle<String>::null();
       }
     }