[Cleanup] Remove obsolete GetDensityRatio

Bug: None
Change-Id: I0aa45c8214cbd847aedbf2ffaeb24236d76b3cc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2493254Reviewed-by: Malay Keshav <malaykeshav@chromium.org>
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821573}

components/exo/pointer.cc

@@ -114,7 +114,6 @@ Pointer::Pointer(PointerDelegate* delegate, Seat* seat)
       seat_(seat),
       cursor_(ui::mojom::CursorType::kNull),
       capture_scale_(GetCaptureDisplayInfo().device_scale_factor()),
-      capture_ratio_(GetCaptureDisplayInfo().GetDensityRatio()),
       cursor_capture_source_id_(base::UnguessableToken::Create()) {
   WMHelper* helper = WMHelper::GetInstance();
   helper->AddPreTargetHandler(this);
@@ -598,7 +597,6 @@ void Pointer::OnCursorDisplayChanged(const display::Display& display) {
   UpdatePointerSurface(root_surface());
   auto info = GetCaptureDisplayInfo();
   capture_scale_ = info.device_scale_factor();
-  capture_ratio_ = info.GetDensityRatio();
 
   auto* cursor_client = WMHelper::GetInstance()->GetCursorClient();
   // TODO(crbug.com/631103): CursorClient does not exist in mash yet.
@@ -747,7 +745,7 @@ void Pointer::UpdateCursor() {
   if (cursor_ == ui::mojom::CursorType::kCustom) {
     SkBitmap bitmap = cursor_bitmap_;
     gfx::Point hotspot =
-        gfx::ScaleToFlooredPoint(cursor_hotspot_, capture_ratio_);
+        gfx::ScaleToFlooredPoint(cursor_hotspot_, capture_scale_);
 
     // TODO(oshima|weidongg): Add cutsom cursor API to handle size/display
     // change without explicit management like this. https://crbug.com/721601.

components/exo/pointer.h

@@ -211,10 +211,6 @@ class Pointer : public SurfaceTreeHost,
   // Scale at which cursor snapshot is captured.
   float capture_scale_;
 
-  // Density ratio of the cursor snapshot. The bitmap is scaled on displays with
-  // a different ratio.
-  float capture_ratio_;
-
   // Source used for cursor capture copy output requests.
   const base::UnguessableToken cursor_capture_source_id_;
 

ui/display/manager/managed_display_info.cc

@@ -407,12 +407,6 @@ void ManagedDisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
   UpdateDisplaySize();
 }
 
-float ManagedDisplayInfo::GetDensityRatio() const {
-  if (Display::IsInternalDisplayId(id_) && device_scale_factor_ == 1.25f)
-    return 1.0f;
-  return device_scale_factor_;
-}
-
 float ManagedDisplayInfo::GetEffectiveDeviceScaleFactor() const {
   return device_scale_factor_ * zoom_factor_;
 }

ui/display/manager/managed_display_info.h

@@ -202,10 +202,6 @@ class DISPLAY_MANAGER_EXPORT ManagedDisplayInfo {
   // Returns the rotation set by a given |source|.
   Display::Rotation GetRotation(Display::RotationSource source) const;
 
-  // Returns a measure of density relative to a display with 1.0 DSF. Unlike the
-  // effective DSF, this is independent from the UI scale.
-  float GetDensityRatio() const;
-
   // Returns the ui scale and device scale factor actually used to create
   // display that chrome sees. This is |device_scale_factor| x |zoom_factor_|.
   // TODO(oshima): Rename to |GetDeviceScaleFactor()|.