Convert ozone/drm DisplaySnapshot_Param to DisplaySnapshotMojo

ui/ozone/common/display_snapshot_proxy.cc

 // Copyright 2014 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 "ui/ozone/common/display_snapshot_proxy.h"
 
 #include <stddef.h>
 
 #include "base/memory/ptr_util.h"
 #include "ui/display/types/display_mode.h"
 #include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
 
 namespace ui {
 
 namespace {
 
 bool SameModes(const DisplayMode_Params& lhs, const DisplayMode_Params& rhs) {
   return lhs.size == rhs.size && lhs.is_interlaced == rhs.is_interlaced &&
          lhs.refresh_rate == rhs.refresh_rate;
 }
 
 }  // namespace
 
 DisplaySnapshotProxy::DisplaySnapshotProxy(const DisplaySnapshot_Params& params)
-    : DisplaySnapshot(
+    : DisplaySnapshotMojo(
           params.display_id,
           params.origin,
           params.physical_size,
           params.type,
           params.is_aspect_preserving_scaling,
           params.has_overscan,
           params.has_color_correction_matrix,
           params.display_name,
           params.sys_path,
           std::vector<std::unique_ptr<const display::DisplayMode>>(),
           params.edid,
-          NULL,
-          NULL),
-      string_representation_(params.string_representation) {
+          nullptr,
+          nullptr,
+          params.string_representation) {
   for (size_t i = 0; i < params.modes.size(); ++i) {
     modes_.push_back(base::MakeUnique<display::DisplayMode>(
         params.modes[i].size, params.modes[i].is_interlaced,
         params.modes[i].refresh_rate));
 
     if (params.has_current_mode &&
         SameModes(params.modes[i], params.current_mode))
       current_mode_ = modes_.back().get();
 
     if (params.has_native_mode &&
         SameModes(params.modes[i], params.native_mode))
       native_mode_ = modes_.back().get();
   }
 
   product_id_ = params.product_id;
   maximum_cursor_size_ = params.maximum_cursor_size;
 }
 
 DisplaySnapshotProxy::~DisplaySnapshotProxy() {
 }
 
-std::string DisplaySnapshotProxy::ToString() const {
-  return string_representation_;
-}
-
 }  // namespace ui