Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/service/gles2_cmd_decoder_unittest_attribs.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest_attribs.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_attribs.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_attribs.cc
index 36b14e51fbd9871ed269f24e2476d3a559286978..a858cf7b59c38492daf090daf0e776fbeb23bfe5 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_attribs.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_attribs.cc
@@ -233,7 +233,7 @@ class GLES2DecoderVertexArraysOESTest : public GLES2DecoderWithShaderTest {
 
   bool vertex_array_deleted_manually_;
 
-  virtual void SetUp() {
+  void SetUp() override {
     InitState init;
     init.gl_version = "opengl es 2.0";
     init.bind_generates_resource = true;
@@ -246,7 +246,7 @@ class GLES2DecoderVertexArraysOESTest : public GLES2DecoderWithShaderTest {
     vertex_array_deleted_manually_ = false;
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     // This should only be set if the test handled deletion of the vertex array
     // itself. Necessary because vertex_array_objects are not sharable, and thus
     // not managed in the ContextGroup, meaning they will be destroyed during
@@ -355,7 +355,7 @@ class GLES2DecoderEmulatedVertexArraysOESTest
  public:
   GLES2DecoderEmulatedVertexArraysOESTest() {}
 
-  virtual void SetUp() {
+  void SetUp() override {
     InitState init;
     init.gl_version = "3.0";
     init.bind_generates_resource = true;