remove useless APIs in WGC3DImpl

gpu/blink/webgraphicscontext3d_impl.h

 // Copyright (c) 2012 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_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
 #define GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 353 matching lines @@
   virtual void vertexAttribPointer(WGC3Duint index,
                                    WGC3Dint size,
                                    WGC3Denum type,
                                    WGC3Dboolean normalized,
                                    WGC3Dsizei stride,
                                    WGC3Dintptr offset);
 
   virtual void viewport(WGC3Dint x, WGC3Dint y,
                         WGC3Dsizei width, WGC3Dsizei height);
 
-  // Support for buffer creation and deletion
-  virtual void genBuffers(WGC3Dsizei count, WebGLId* ids);
-  virtual void genFramebuffers(WGC3Dsizei count, WebGLId* ids);
-  virtual void genRenderbuffers(WGC3Dsizei count, WebGLId* ids);
-  virtual void genTextures(WGC3Dsizei count, WebGLId* ids);
-
-  virtual void deleteBuffers(WGC3Dsizei count, WebGLId* ids);
-  virtual void deleteFramebuffers(WGC3Dsizei count, WebGLId* ids);
-  virtual void deleteRenderbuffers(WGC3Dsizei count, WebGLId* ids);
-  virtual void deleteTextures(WGC3Dsizei count, WebGLId* ids);
-
   virtual WebGLId createBuffer();
   virtual WebGLId createFramebuffer();
   virtual WebGLId createRenderbuffer();
   virtual WebGLId createTexture();
 
   virtual void deleteBuffer(WebGLId);
   virtual void deleteFramebuffer(WebGLId);
   virtual void deleteRenderbuffer(WebGLId);
   virtual void deleteTexture(WebGLId);
 
@@ skipping 211 matching lines @@
   std::vector<WGC3Denum> synthetic_errors_;
 
   ::gpu::gles2::GLES2Interface* gl_;
   bool lose_context_when_out_of_memory_;
   uint32_t flush_id_;
 };
 
 }  // namespace gpu_blink
 
 #endif  // GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_