move all O3D specific command buffer stuff to command_buffer::o3d...

command_buffer/service/cross/gl/gapi_gl.h

Index: command_buffer/service/cross/gl/gapi_gl.h
===================================================================
--- command_buffer/service/cross/gl/gapi_gl.h	(revision 30103)
+++ command_buffer/service/cross/gl/gapi_gl.h	(working copy)
@@ -50,6 +50,7 @@
 
 namespace o3d {
 namespace command_buffer {
+namespace o3d {
 #if defined(OS_LINUX)
 class XWindowWrapper;
 #endif  // defined(OS_LINUX)
@@ -459,6 +460,7 @@
   ResourceMap<RenderDepthStencilSurfaceGL> depth_surfaces_;
 };
 
+}  // namespace o3d
 }  // namespace command_buffer
 }  // namespace o3d