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

Index: gpu/command_buffer/service/gles2_cmd_clear_framebuffer.h
diff --git a/gpu/command_buffer/service/gles2_cmd_clear_framebuffer.h b/gpu/command_buffer/service/gles2_cmd_clear_framebuffer.h
index ece7218532b5ee5c004ce56b3f18e22c6cfe76ad..18196663c9af2fa9cc0332bba312e3b5d54f2dde 100644
--- a/gpu/command_buffer/service/gles2_cmd_clear_framebuffer.h
+++ b/gpu/command_buffer/service/gles2_cmd_clear_framebuffer.h
@@ -5,9 +5,6 @@
 #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"
@@ -22,8 +19,7 @@
 
 class GPU_EXPORT ClearFramebufferResourceManager {
  public:
-  ClearFramebufferResourceManager(const gles2::GLES2Decoder* decoder,
-                                  const gl::GLVersionInfo& gl_version_info);
+  ClearFramebufferResourceManager(const gles2::GLES2Decoder* decoder);
   ~ClearFramebufferResourceManager();
 
 
@@ -39,22 +35,16 @@
 
  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);
 };