gpu: Cleanup class/struct forward declarations

gpu/command_buffer/service/gles2_cmd_apply_framebuffer_attachment_cmaa_intel.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_APPLY_FRAMEBUFFER_ATTACHMENT_CMAA_INTEL_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_APPLY_FRAMEBUFFER_ATTACHMENT_CMAA_INTEL_H_
 
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/gpu_export.h"
 
-namespace {
-class CMAAEffect;
-}
-
 namespace gpu {
 namespace gles2 {
 class CopyTextureCHROMIUMResourceManager;
 class GLES2Decoder;
 class Framebuffer;
 
 // This class encapsulates the resources required to implement the
 // GL_INTEL_framebuffer_CMAA extension via shaders.
 //
 // The CMAA Conservative Morphological Anti-Aliasing) algorithm is applied to
@@ skipping 67 matching lines @@
   static const char cmaa_frag_s1_[];
   static const char cmaa_frag_s2_[];
 
   DISALLOW_COPY_AND_ASSIGN(ApplyFramebufferAttachmentCMAAINTELResourceManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_APPLY_FRAMEBUFFER_ATTACHMENT_CMAA_INTEL_H_