Remove unused PPB_View_Dev

ppapi/cpp/dev/view_dev.cc

-// 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.
-
-#include "ppapi/cpp/dev/view_dev.h"
-
-#include "ppapi/c/dev/ppb_view_dev.h"
-#include "ppapi/cpp/module_impl.h"
-
-namespace pp {
-
-namespace {
-
-template <> const char* interface_name<PPB_View_Dev>() {
-  return PPB_VIEW_DEV_INTERFACE;
-}
-
-}  // namespace
-
-float ViewDev::GetDeviceScale() const {
-  if (!has_interface<PPB_View_Dev>())
-    return 1.0f;
-  return get_interface<PPB_View_Dev>()->GetDeviceScale(pp_resource());
-}
-
-float ViewDev::GetCSSScale() const {
-  if (!has_interface<PPB_View_Dev>())
-    return 1.0f;
-  return get_interface<PPB_View_Dev>()->GetCSSScale(pp_resource());
-}
-
-}  // namespace pp