Revert of Make gl_clear_broken workaround support core profile and use it under AMD Linux Catalyst driver

gpu/command_buffer/service/gles2_cmd_clear_framebuffer.h

 // Copyright 2014 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_CLEAR_FRAMEBUFFER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_CLEAR_FRAMEBUFFER_H_
 
-#include <string>
-
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/gpu_export.h"
 
 namespace gfx {
 class Size;
 }
 
 namespace gpu {
 namespace gles2 {
 class GLES2Decoder;
 
 class GPU_EXPORT ClearFramebufferResourceManager {
  public:
-  ClearFramebufferResourceManager(const gles2::GLES2Decoder* decoder,
-                                  const gl::GLVersionInfo& gl_version_info);
+  ClearFramebufferResourceManager(const gles2::GLES2Decoder* decoder);
   ~ClearFramebufferResourceManager();
 
 
   void ClearFramebuffer(const gles2::GLES2Decoder* decoder,
                         const gfx::Size& framebuffer_size,
                         GLbitfield mask,
                         GLfloat clear_color_red,
                         GLfloat clear_color_green,
                         GLfloat clear_color_blue,
                         GLfloat clear_color_alpha,
                         GLfloat clear_depth_value,
                         GLint clear_stencil_value);
 
  private:
   void Initialize(const gles2::GLES2Decoder* decoder);
-  void InitShader(const gles2::GLES2Decoder* decoder, GLenum type);
   void Destroy();
 
   // The attributes used during invocation of the extension.
   static const GLuint kVertexPositionAttrib = 0;
 
   bool initialized_;
-  bool is_desktop_core_profile_;
   GLuint program_;
-  GLuint vao_;
-  GLint depth_handle_;
-  GLint color_handle_;
+  GLuint depth_handle_;
+  GLuint color_handle_;
   GLuint buffer_id_;
-  base::hash_map<std::string, std::string> name_map_;
-  std::string vertex_shader_source_;
-  std::string fragment_shader_source_;
 
   DISALLOW_COPY_AND_ASSIGN(ClearFramebufferResourceManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_CLEAR_FRAMEBUFFER_H_