Fixes for re-enabling more MSVC level 4 warnings: gpu/ edition

gpu/command_buffer/service/gles2_cmd_decoder.h

Index: gpu/command_buffer/service/gles2_cmd_decoder.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.h b/gpu/command_buffer/service/gles2_cmd_decoder.h
index 41d2938ab0c258e46581b8c0729a4a136671ad4a..b2e92c65f7cfad019fdae31cb3c3187e3f43f2cd 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -17,6 +17,7 @@
 #include "gpu/command_buffer/service/common_decoder.h"
 #include "gpu/command_buffer/service/logger.h"
 #include "ui/gfx/size.h"
+#include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 
 namespace gfx {
@@ -59,6 +60,9 @@ class GPU_EXPORT GLES2Decoder : public base::SupportsWeakPtr<GLES2Decoder>,
   typedef error::Error Error;
   typedef base::Callback<bool(uint32 id)> WaitSyncPointCallback;
 
+  // The default stencil mask, which has all bits set.
+  static const GLuint kDefaultStencilMask;
+
   // Creates a decoder.
   static GLES2Decoder* Create(ContextGroup* group);