Add ContextProvider::InvalidateGrContext to reset GL state in GrContext

ui/compositor/test/in_process_context_provider.cc

Index: ui/compositor/test/in_process_context_provider.cc
diff --git a/ui/compositor/test/in_process_context_provider.cc b/ui/compositor/test/in_process_context_provider.cc
index d59736ff86d2730a1cf6cb39897fe317b73bd4f4..6e252d8ea94ea797b5de8598125db177c61f81de 100644
--- a/ui/compositor/test/in_process_context_provider.cc
+++ b/ui/compositor/test/in_process_context_provider.cc
@@ -165,6 +165,13 @@ class GrContext* InProcessContextProvider::GrContext() {
   return gr_context_.get();
 }
 
+void InProcessContextProvider::InvalidateGrContext(uint32_t state) {
+  DCHECK(context_thread_checker_.CalledOnValidThread());
+
+  if (gr_context_)
+    gr_context_.get()->resetContext(state);
+}
+
 void InProcessContextProvider::SetupLock() {
 }