Mojo C++ bindings: Generate InterfaceHandle<> instead of InterfacePtr<>.

mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl

 {#- TODO(vardhan): This template produces crazy amounts of whitespace. Clean
 this stuff up (it involves digging through all the templates included here. -#}
 // Copyright 2013 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.
 
 {%- import "struct_macros.tmpl" as struct_macros %}
 {%  import "interface_macros.tmpl" as interface_macros -%}
 {%- set header_guard = "%s_H_"|
         format(module.path|upper|replace("/","_")|replace(".","_")) %}
@@ skipping 25 matching lines @@
 {#------------------------ #}
 
 {%- for namespace in namespaces_as_array %}
 namespace {{namespace}} {
 {%- endfor %}
 
 {#--- Interface Forward Declarations -#}
 {%  for interface in interfaces %}
 class {{interface.name}};
 using {{interface.name}}Ptr = mojo::InterfacePtr<{{interface.name}}>;
-using {{interface.name}}Handle = mojo::InterfaceHandle<{{interface.name}}>;
 {%  endfor %}
 
 {#--- Struct Forward Declarations -#}
 {%  for struct in structs %}
 {{ struct_macros.structptr_forward_decl(struct) }}
 {%  endfor %}
 
 {#--- Union Forward Declarations -#}
 {%  for union in unions %}
 class {{union.name}};
@@ skipping 119 matching lines @@
 {#--- Request and response parameter structs for Interface methods -#}
 {%  for interface in interfaces -%}
       {{interface_macros.declare_param_structs_for_interface(interface)}}
 {%- endfor %}
 
 {%- for namespace in namespaces_as_array|reverse %}
 }  // namespace {{namespace}}
 {%- endfor %}
 
 #endif  // {{header_guard}}