Improve BindBufferBase/BindBufferRange and a few other commands.

gpu/command_buffer/service/context_group.h

Index: gpu/command_buffer/service/context_group.h
diff --git a/gpu/command_buffer/service/context_group.h b/gpu/command_buffer/service/context_group.h
index 63e9a34094fbbc3fb076d44c8068df6f9517eca2..8eeaf531d66eb2aececf708772220cf663e2ab6f 100644
--- a/gpu/command_buffer/service/context_group.h
+++ b/gpu/command_buffer/service/context_group.h
@@ -177,23 +177,7 @@ class GPU_EXPORT ContextGroup : public base::RefCounted<ContextGroup> {
     draw_buffer_ = buf;
   }
 
-  void AddBufferId(GLuint client_id, GLuint service_id) {
-    buffers_id_map_[client_id] = service_id;
-  }
-
-  bool GetBufferServiceId(GLuint client_id, GLuint* service_id) const {
-    std::map<GLuint, GLuint>::const_iterator iter =
-        buffers_id_map_.find(client_id);
-    if (iter == buffers_id_map_.end())
-      return false;
-    if (service_id)
-      *service_id = iter->second;
-    return true;
-  }
-
-  void RemoveBufferId(GLuint client_id) {
-    buffers_id_map_.erase(client_id);
-  }
+  bool GetBufferServiceId(GLuint client_id, GLuint* service_id) const;
 
   void AddSamplerId(GLuint client_id, GLuint service_id) {
     samplers_id_map_[client_id] = service_id;
@@ -283,7 +267,6 @@ class GPU_EXPORT ContextGroup : public base::RefCounted<ContextGroup> {
   std::vector<base::WeakPtr<gles2::GLES2Decoder> > decoders_;
 
   // Mappings from client side IDs to service side IDs.
-  std::map<GLuint, GLuint> buffers_id_map_;
   std::map<GLuint, GLuint> samplers_id_map_;
   std::map<GLuint, GLuint> transformfeedbacks_id_map_;