Add texture swizzle back to command buffer.

gpu/command_buffer/service/gles2_cmd_decoder_unittest.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.h b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.h
index 9eab7fc9536af41f4d48fb71c9a57c4e1ffac885..72577a3d8863195a74fd2eea475396dd9ef5de8f 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.h
@@ -78,6 +78,15 @@ class GLES3DecoderTest : public GLES2DecoderTest {
   void SetUp() override;
 };
 
+class WebGL2DecoderTest : public GLES2DecoderTest {
+ public:
+  WebGL2DecoderTest() { shader_language_version_ = 300; }
+
+  // Override default setup so ES3 capabilities are enabled by default
+  // and WebGL2 specific rules are enforced.
+  void SetUp() override;
+};
+
 class GLES3DecoderWithShaderTest : public GLES2DecoderWithShaderTest {
  public:
   GLES3DecoderWithShaderTest() { shader_language_version_ = 300; }