Add ContextProvider::InvalidateGrContext to reset GL state in GrContext

cc/test/test_context_provider.cc

Index: cc/test/test_context_provider.cc
diff --git a/cc/test/test_context_provider.cc b/cc/test/test_context_provider.cc
index 7c9bb2ce07592171a5f7f91db0420bd916668e0d..2bf803c19f612a377419993ccd896cf94cc1decd 100644
--- a/cc/test/test_context_provider.cc
+++ b/cc/test/test_context_provider.cc
@@ -112,6 +112,14 @@ class GrContext* TestContextProvider::GrContext() {
   return gr_context_.get();
 }
 
+void TestContextProvider::InvalidateGrContext(uint32_t state) {
+  DCHECK(bound_);
+  DCHECK(context_thread_checker_.CalledOnValidThread());
+
+  if (gr_context_)
+    gr_context_.get()->resetContext(state);

[danakj, 2015/10/13 22:55:54]

foo_.get()->bar() should be written foo_->bar()

+}
+
 void TestContextProvider::SetupLock() {
 }