Update from chromium https://crrev.com/301725/

gpu/command_buffer/tests/gl_depth_texture_unittest.cc

Index: gpu/command_buffer/tests/gl_depth_texture_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_depth_texture_unittest.cc b/gpu/command_buffer/tests/gl_depth_texture_unittest.cc
index 83bb84c3d2e3e537e0f645d4ca45fc2f51434f95..5bbbb0683d3265525cbf66a0d4f03f2634282830 100644
--- a/gpu/command_buffer/tests/gl_depth_texture_unittest.cc
+++ b/gpu/command_buffer/tests/gl_depth_texture_unittest.cc
@@ -17,15 +17,13 @@ namespace gpu {
 class DepthTextureTest : public testing::Test {
  protected:
   static const GLsizei kResolution = 64;
-  virtual void SetUp() {
+  void SetUp() override {
     GLManager::Options options;
     options.size = gfx::Size(kResolution, kResolution);
     gl_.Initialize(options);
   }
 
-  virtual void TearDown() {
-    gl_.Destroy();
-  }
+  void TearDown() override { gl_.Destroy(); }
 
   GLuint SetupUnitQuad(GLint position_location);