Update last few users of deprecated CreateShadowDrawLooper and remove

ash/magnifier/partial_magnification_controller.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 "ash/magnifier/partial_magnification_controller.h"
 
 #include "ash/common/system/chromeos/palette/palette_utils.h"
 #include "ash/shell.h"
 #include "third_party/skia/include/core/SkDrawLooper.h"
 #include "ui/aura/window_event_dispatcher.h"
@@ skipping 144 matching lines @@
 
  private:
   // ui::LayerDelegate:
   void OnPaintLayer(const ui::PaintContext& context) override {
     ui::PaintRecorder recorder(context, magnifier_window_bounds_.size());
 
     // Draw the shadow.
     cc::PaintFlags shadow_flags;
     shadow_flags.setAntiAlias(true);
     shadow_flags.setColor(SK_ColorTRANSPARENT);
-    shadow_flags.setLooper(
-        gfx::CreateShadowDrawLooperCorrectBlur(magnifier_shadows_));
+    shadow_flags.setLooper(gfx::CreateShadowDrawLooper(magnifier_shadows_));
     gfx::Rect shadow_bounds(magnifier_window_bounds_.size());
     recorder.canvas()->DrawCircle(
         shadow_bounds.CenterPoint(),
         shadow_bounds.width() / 2 - kShadowThickness - kShadowOffset,
         shadow_flags);
 
     cc::PaintFlags border_flags;
     border_flags.setAntiAlias(true);
     border_flags.setStyle(cc::PaintFlags::kStroke_Style);
 
@@ skipping 196 matching lines @@
 
 void PartialMagnificationController::RemoveZoomWidgetObservers() {
   DCHECK(host_widget_);
   host_widget_->RemoveObserver(this);
   aura::Window* root_window = host_widget_->GetNativeView()->GetRootWindow();
   DCHECK(root_window);
   root_window->RemoveObserver(this);
 }
 
 }  // namespace ash