Delete copy_texture_to_parent_texture from GPU command buffer code.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
===================================================================
--- gpu/command_buffer/service/gles2_cmd_decoder.cc	(revision 95857)
+++ gpu/command_buffer/service/gles2_cmd_decoder.cc	(working copy)
@@ -1036,9 +1036,6 @@
   // Wrapper for glValidateProgram.
   void DoValidateProgram(GLuint program_client_id);
 
-  void DoCopyTextureToParentTextureCHROMIUM(
-      GLuint client_texture_id, GLuint parent_client_texture_id);
-
   void DoResizeCHROMIUM(GLuint width, GLuint height);
 
   void DoSetSurfaceCHROMIUM(GLint surface_id);
@@ -1285,8 +1282,6 @@
   GLenum offscreen_target_stencil_format_;
   GLsizei offscreen_target_samples_;
 
-  GLuint copy_texture_to_parent_texture_fb_;
-
   // The copy that is saved when SwapBuffers is called.
   scoped_ptr<FrameBuffer> offscreen_saved_frame_buffer_;
   scoped_ptr<Texture> offscreen_saved_color_texture_;
@@ -1680,7 +1675,6 @@
       offscreen_target_depth_format_(0),
       offscreen_target_stencil_format_(0),
       offscreen_target_samples_(0),
-      copy_texture_to_parent_texture_fb_(0),
       offscreen_saved_color_format_(0),
       back_buffer_color_format_(0),
       back_buffer_has_depth_(false),
@@ -1934,8 +1928,6 @@
     // Bind to the new default frame buffer (the offscreen target frame buffer).
     // This should now be associated with ID zero.
     DoBindFramebuffer(GL_FRAMEBUFFER, 0);
-
-    glGenFramebuffersEXT(1, &copy_texture_to_parent_texture_fb_);
   }
 
   // OpenGL ES 2.0 implicitly enables the desktop GL capability
@@ -2456,9 +2448,6 @@
       glDeleteBuffersARB(1, &fixed_attrib_buffer_id_);
     }
 
-    if (copy_texture_to_parent_texture_fb_)
-      glDeleteFramebuffersEXT(1, &copy_texture_to_parent_texture_fb_);
-
     if (offscreen_target_frame_buffer_.get())
       offscreen_target_frame_buffer_->Destroy();
     if (offscreen_target_color_texture_.get())
@@ -2572,37 +2561,6 @@
   pending_offscreen_size_ = size;
 }
 
-void GLES2DecoderImpl::DoCopyTextureToParentTextureCHROMIUM(
-    GLuint client_texture_id,
-    GLuint parent_client_texture_id) {
-  if (parent_) {
-    TextureManager::TextureInfo* texture = texture_manager()->GetTextureInfo(
-        client_texture_id);
-    TextureManager::TextureInfo* parent_texture =
-        parent_->texture_manager()->GetTextureInfo(parent_client_texture_id);
-    if (!texture || !parent_texture) {
-      current_decoder_error_ = error::kInvalidArguments;
-      return;
-    }
-    ScopedFrameBufferBinder fb_binder(this, copy_texture_to_parent_texture_fb_);
-    glFramebufferTexture2DEXT(GL_FRAMEBUFFER,
-                              GL_COLOR_ATTACHMENT0,
-                              GL_TEXTURE_2D,
-                              texture->service_id(),
-                              0);
-    ScopedTexture2DBinder tex_binder(this, parent_texture->service_id());
-    GLsizei width, height;
-    parent_texture->GetLevelSize(GL_TEXTURE_2D, 0, &width, &height);
-    glCopyTexImage2D(GL_TEXTURE_2D,
-                     0,  // level
-                     GL_RGBA,
-                     0, 0,  // x, y
-                     width,
-                     height,
-                     0);  // border
-  }
-}
-
 void GLES2DecoderImpl::DoResizeCHROMIUM(GLuint width, GLuint height) {
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(TOUCH_UI)
   // Make sure that we are done drawing to the back buffer before resizing.