Relocate reuseable portions of ash/display/display_util.*

ash/accelerators/accelerator_commands_aura.cc

Index: ash/accelerators/accelerator_commands_aura.cc
diff --git a/ash/accelerators/accelerator_commands_aura.cc b/ash/accelerators/accelerator_commands_aura.cc
index ea84e462b3b0dea03e8c4f6d1d45a77a07d8b066..fc252343985a54e8582e125c9aec49fdcaf0525d 100644
--- a/ash/accelerators/accelerator_commands_aura.cc
+++ b/ash/accelerators/accelerator_commands_aura.cc
@@ -7,7 +7,6 @@
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_window.h"
 #include "ash/display/display_manager.h"
-#include "ash/display/display_util.h"
 #include "ash/shell.h"
 #include "ash/wm/screen_pinning_controller.h"
 #include "base/metrics/user_metrics.h"
@@ -35,42 +34,13 @@ bool ZoomInternalDisplay(bool up) {
     base::RecordAction(base::UserMetricsAction("Accel_Scale_Ui_Down"));
 
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-
-  int64_t display_id = display_manager->IsInUnifiedMode()
-                           ? DisplayManager::kUnifiedDisplayId
-                           : display_manager->GetDisplayIdForUIScaling();
-  const display::ManagedDisplayInfo& display_info =
-      display_manager->GetDisplayInfo(display_id);
-
-  scoped_refptr<display::ManagedDisplayMode> mode;
-  if (display_manager->IsInUnifiedMode())
-    mode = GetDisplayModeForNextResolution(display_info, up);
-  else
-    mode = GetDisplayModeForNextUIScale(display_info, up);
-
-  if (!mode)
-    return false;
-  return display_manager->SetDisplayMode(display_id, mode);
+  return display_manager->ZoomInternalDisplay(up);
 }
 
 void ResetInternalDisplayZoom() {
   base::RecordAction(base::UserMetricsAction("Accel_Scale_Ui_Reset"));
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-
-  if (display_manager->IsInUnifiedMode()) {
-    const display::ManagedDisplayInfo& display_info =
-        display_manager->GetDisplayInfo(DisplayManager::kUnifiedDisplayId);
-    const display::ManagedDisplayInfo::ManagedDisplayModeList& modes =
-        display_info.display_modes();
-    auto iter = std::find_if(
-        modes.begin(), modes.end(),
-        [](const scoped_refptr<display::ManagedDisplayMode>& mode) {
-          return mode->native();
-        });
-    display_manager->SetDisplayMode(DisplayManager::kUnifiedDisplayId, *iter);
-  } else {
-    SetDisplayUIScale(display_manager->GetDisplayIdForUIScaling(), 1.0f);
-  }
+  display_manager->ResetInternalDisplayZoom();
 }
 
 void Unpin() {