[SystemInfo API] Rewrite DisplayInfoProvider without SystemInfoProvider.

chrome/browser/extensions/api/system_display/display_info_provider_win.cc

 // 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.
 
 #include "chrome/browser/extensions/api/system_display/display_info_provider.h"
 
-#include <windows.h>
-
-#include "base/strings/utf_string_conversions.h"
-#include "ui/base/win/dpi.h"
-#include "ui/gfx/display.h"
-#include "ui/gfx/size.h"
-
 namespace extensions {
 
-using api::system_display::Bounds;
-using api::system_display::DisplayUnitInfo;
-
-namespace {
-
-BOOL CALLBACK EnumMonitorCallback(HMONITOR monitor,
-                                  HDC hdc,
-                                  LPRECT rect,
-                                  LPARAM data) {
-  DisplayInfo* display_info =
-      reinterpret_cast<DisplayInfo*>(data);
-  DCHECK(display_info);
-
-  linked_ptr<DisplayUnitInfo> unit(new DisplayUnitInfo);
-
-  MONITORINFOEX monitor_info;
-  ZeroMemory(&monitor_info, sizeof(MONITORINFOEX));
-  monitor_info.cbSize = sizeof(monitor_info);
-  GetMonitorInfo(monitor, &monitor_info);
-
-  DISPLAY_DEVICE device;
-  device.cb = sizeof(device);
-  if (!EnumDisplayDevices(monitor_info.szDevice, 0, &device, 0))
-    return FALSE;
-
-  gfx::Display display(0, gfx::Rect(monitor_info.rcMonitor));
-  display.set_work_area(gfx::Rect(monitor_info.rcWork));
-
-  gfx::Size dpi(ui::GetDPI());
-  unit->id = WideToUTF8(device.DeviceID);
-  unit->name = WideToUTF8(device.DeviceString);
-  unit->is_primary = monitor_info.dwFlags & MONITORINFOF_PRIMARY ? true : false;
-
-  // TODO(hongbo): Figure out how to determine whether the display monitor is
-  // internal or not.
-  unit->is_internal = false;
-  unit->is_enabled = device.StateFlags & DISPLAY_DEVICE_ACTIVE ? true : false;
-  unit->dpi_x = dpi.width();
-  unit->dpi_y = dpi.height();
-  unit->bounds.left = display.bounds().x();
-  unit->bounds.top = display.bounds().y();
-  unit->bounds.width = display.bounds().width();
-  unit->bounds.height = display.bounds().height();
-  unit->work_area.left = display.work_area().x();
-  unit->work_area.top = display.work_area().y();
-  unit->work_area.width = display.work_area().width();
-  unit->work_area.height = display.work_area().height();
-  display_info->push_back(unit);
-
-  return TRUE;
-}
-
-}  // namespace
-
-void DisplayInfoProvider::SetInfo(
-    const std::string& display_id,
+bool DisplayInfoProvider::SetInfo(const std::string& display_id,
     const api::system_display::DisplayProperties& info,
-    const SetInfoCallback& callback) {
-  base::MessageLoopProxy::current()->PostTask(
-      FROM_HERE,
-      base::Bind(callback, false, "Not implemented"));
-}
-
-// TODO(hongbo): consolidate implementation using gfx::Display/gfx::Screen.
-bool DisplayInfoProvider::QueryInfo() {
-  info_.clear();
-
-  if (EnumDisplayMonitors(NULL, NULL, EnumMonitorCallback,
-        reinterpret_cast<LPARAM>(&info_)))
-    return true;
+    std::string* error) {
+  *error = "Not implemented";
   return false;
 }
 
 void DisplayInfoProvider::UpdateDisplayUnitInfoForPlatform(
     const gfx::Display& display,
     extensions::api::system_display::DisplayUnitInfo* unit) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace extensions