patch to add --verbose_gc

gistfile1.txt

commit 386f1f30346674a8b965bfdb17d85957ef4de2d7
Author: Eric Seidel <eseidel@chromium.org>
Date:   Wed Jun 10 09:21:18 2015 -0700

    gc

diff --git a/sky/engine/core/script/dart_controller.cc b/sky/engine/core/script/dart_controller.cc
index 62665ab..3dc083c 100644
--- a/sky/engine/core/script/dart_controller.cc
+++ b/sky/engine/core/script/dart_controller.cc
@@ -365,6 +365,10 @@ void DartController::ClearForClose() {
   dom_dart_state_.clear();
 }
 
+static const char* kFooArgs[] = {
+  "--verbose_gc",
+};
+
 void DartController::InitVM() {
   int argc = 0;
   const char** argv = nullptr;
@@ -374,6 +378,9 @@ void DartController::InitVM() {
   argv = kCheckedModeArgs;
 #endif
 
+  argc = arraysize(kFooArgs);
+  argv = kFooArgs;
+
   dart::bin::BootstrapDartIo();
 
   CHECK(Dart_SetVMFlags(argc, argv));