Add workaround for Mac stencil buffer leak

cc/test/test_in_process_context_provider.cc

Index: cc/test/test_in_process_context_provider.cc
diff --git a/cc/test/test_in_process_context_provider.cc b/cc/test/test_in_process_context_provider.cc
index 042be7cf12448146a939cfb77f59f8692f85cde8..5047dc4f1f3832c6eba3ba637a2ab0ad562ea971 100644
--- a/cc/test/test_in_process_context_provider.cc
+++ b/cc/test/test_in_process_context_provider.cc
@@ -87,7 +87,8 @@ class GrContext* TestInProcessContextProvider::GrContext() {
   if (gr_context_)
     return gr_context_->get();
 
-  gr_context_.reset(new skia_bindings::GrContextForGLES2Interface(ContextGL()));
+  gr_context_.reset(new skia_bindings::GrContextForGLES2Interface(
+      ContextGL(), ContextCapabilities()));
   cache_controller_->SetGrContext(gr_context_->get());
   return gr_context_->get();
 }