Update from https://crrev.com/304418

cc/resources/resource_provider_unittest.cc

Index: cc/resources/resource_provider_unittest.cc
diff --git a/cc/resources/resource_provider_unittest.cc b/cc/resources/resource_provider_unittest.cc
index e507ad67a93558d64c805a6edc69db2be348791a..d8bfe4c160a98d6b8a65464aefef2a035fa437bb 100644
--- a/cc/resources/resource_provider_unittest.cc
+++ b/cc/resources/resource_provider_unittest.cc
@@ -103,11 +103,11 @@ class TextureStateTrackingContext : public TestWebGraphicsContext3D {
 
   // Force all textures to be consecutive numbers starting at "1",
   // so we easily can test for them.
-  virtual GLuint NextTextureId() override {
+  GLuint NextTextureId() override {
     base::AutoLock lock(namespace_->lock);
     return namespace_->next_texture_id++;
   }
-  virtual void RetireTextureId(GLuint) override {}
+  void RetireTextureId(GLuint) override {}
 };
 
 // Shared data between multiple ResourceProviderContext. This contains mailbox