Update from https://crrev.com/316786

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 34b0493d8120c032b08f5419450a9687fd148526..3539bd253dbd6072c794e702be3d6cecfab030a6 100644
--- a/cc/test/test_in_process_context_provider.cc
+++ b/cc/test/test_in_process_context_provider.cc
@@ -124,6 +124,13 @@ class GrContext* TestInProcessContextProvider::GrContext() {
   return gr_context_.get();
 }
 
+void TestInProcessContextProvider::SetupLock() {
+}
+
+base::Lock* TestInProcessContextProvider::GetLock() {
+  return &context_lock_;
+}
+
 ContextProvider::Capabilities
 TestInProcessContextProvider::ContextCapabilities() {
   ContextProvider::Capabilities capabilities;