Don't use gl::Error in validation.

src/libANGLE/Error.h

@@ -98,14 +98,6 @@ using ErrorStream = angle::ErrorStreamBase<Error, GLenum, GL_NO_ERROR, GLenum, E
 
 }  // namespace priv
 
-using InvalidEnum                 = priv::ErrorStream<GL_INVALID_ENUM>;
-using InvalidValue                = priv::ErrorStream<GL_INVALID_VALUE>;
-using InvalidOperation            = priv::ErrorStream<GL_INVALID_OPERATION>;
-using StackOverflow               = priv::ErrorStream<GL_STACK_OVERFLOW>;
-using StackUnderflow              = priv::ErrorStream<GL_STACK_UNDERFLOW>;
-using OutOfMemory                 = priv::ErrorStream<GL_OUT_OF_MEMORY>;
-using InvalidFramebufferOperation = priv::ErrorStream<GL_INVALID_FRAMEBUFFER_OPERATION>;
-
 inline Error NoError()
 {
     return Error::NoError();

src/libANGLE/validationES.h

@@ -600,12 +600,12 @@ bool ValidateES3TexStorage3DParameters(Context *context,
 // implementation format info for incomplete framebuffers. It seems like these queries are
 // incongruent with the other errors.
 // Inlined for speed.
-template <typename ErrorStream = InvalidFramebufferOperation>
+template <GLenum ErrorCode = GL_INVALID_FRAMEBUFFER_OPERATION>
 ANGLE_INLINE bool ValidateFramebufferComplete(Context *context, Framebuffer *framebuffer)
 {
     if (!framebuffer->isComplete(context))
     {
-        context->handleError(ErrorStream());
+        context->validationError(ErrorCode, kErrorFramebufferIncomplete);
         return false;
     }