Revert of Extend CopyTextureCHROMIUM to more ES 3.0 texture formats.

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h

Index: gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
diff --git a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
index bb3ff305d24c8db440eb0e79098f599d1b954011..dd705323badecb1833e85a8da0353fb8b1dbd7f3 100644
--- a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
+++ b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
@@ -17,28 +17,6 @@
 namespace gles2 {
 
 class GLES2Decoder;
-
-enum CopyTextureMethod {
-  // Use CopyTex{Sub}Image2D to copy from the source to the destination.
-  DIRECT_COPY,
-  // Draw from the source to the destination texture.
-  DIRECT_DRAW,
-  // Draw to an intermediate texture, and then copy to the destination texture.
-  DRAW_AND_COPY,
-  // CopyTexture isn't available.
-  NOT_COPYABLE
-};
-
-// TODOs(qiankun.miao@intel.com):
-// 1. Add readback path for RGB9_E5 and float formats (if extension isn't
-// available and they are not color-renderable).
-// 2. Support faces of cube map texture as valid dest target. The cube map
-// texture may be incomplete currently.
-// 3. Add support for levels other than 0.
-// 4. Support ALPHA, LUMINANCE and LUMINANCE_ALPHA formats on core profile.
-// 5. Update the extension doc after the whole work is done
-// in gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt. We probably
-// will need a ES2 version and a ES3 version.
 
 // This class encapsulates the resources required to implement the
 // GL_CHROMIUM_copy_texture extension.  The copy operation is performed
@@ -64,8 +42,7 @@
                      GLsizei height,
                      bool flip_y,
                      bool premultiply_alpha,
-                     bool unpremultiply_alpha,
-                     CopyTextureMethod method);
+                     bool unpremultiply_alpha);
 
   void DoCopySubTexture(const gles2::GLES2Decoder* decoder,
                         GLenum source_target,
@@ -86,8 +63,7 @@
                         GLsizei source_height,
                         bool flip_y,
                         bool premultiply_alpha,
-                        bool unpremultiply_alpha,
-                        CopyTextureMethod method);
+                        bool unpremultiply_alpha);
 
   void DoCopySubTextureWithTransform(const gles2::GLES2Decoder* decoder,
                                      GLenum source_target,
@@ -118,10 +94,8 @@
   void DoCopyTextureWithTransform(const gles2::GLES2Decoder* decoder,
                                   GLenum source_target,
                                   GLuint source_id,
-                                  GLenum source_format,
                                   GLenum dest_target,
                                   GLuint dest_id,
-                                  GLenum dest_format,
                                   GLsizei width,
                                   GLsizei height,
                                   bool flip_y,
@@ -162,10 +136,8 @@
   void DoCopyTextureInternal(const gles2::GLES2Decoder* decoder,
                              GLenum source_target,
                              GLuint source_id,
-                             GLenum source_format,
                              GLenum dest_target,
                              GLuint dest_id,
-                             GLenum dest_format,
                              GLint xoffset,
                              GLint yoffset,
                              GLint x,
@@ -184,7 +156,7 @@
   bool initialized_;
   bool nv_egl_stream_consumer_external_;
   typedef std::vector<GLuint> ShaderVector;
-  ShaderVector vertex_shaders_;
+  GLuint vertex_shader_;
   ShaderVector fragment_shaders_;
   typedef int ProgramMapKey;
   typedef base::hash_map<ProgramMapKey, ProgramInfo> ProgramMap;