Enable high dpi in win/views.

ui/gfx/canvas_paint_win.h

 // Copyright (c) 2011 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.
 
 #ifndef UI_GFX_CANVAS_PAINT_WIN_H_
 #define UI_GFX_CANVAS_PAINT_WIN_H_
 
 #include "skia/ext/platform_canvas.h"
+#include "ui/base/win/dpi.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/canvas_paint.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 
 // A class designed to help with WM_PAINT operations on Windows. It will
 // do BeginPaint/EndPaint on init/destruction, and will create the bitmap and
 // canvas with the correct size and transform for the dirty rect. The bitmap
 // will be automatically painted to the screen on destruction.
@@ skipping 84 matching lines @@
   }
 
   void init(bool opaque) {
     // FIXME(brettw) for ClearType, we probably want to expand the bounds of
     // painting by one pixel so that the boundaries will be correct (ClearType
     // text can depend on the adjacent pixel). Then we would paint just the
     // inset pixels to the screen.
     const int width = ps_.rcPaint.right - ps_.rcPaint.left;
     const int height = ps_.rcPaint.bottom - ps_.rcPaint.top;
 
-    RecreateBackingCanvas(gfx::Size(width, height), ui::SCALE_FACTOR_100P,
-                          opaque);
+    RecreateBackingCanvas(gfx::Size(width, height),
+        ui::GetScaleFactorFromScale(ui::win::GetDeviceScaleFactor()),
+        opaque);
     skia::PlatformCanvas* canvas = platform_canvas();
 
     canvas->clear(SkColorSetARGB(0, 0, 0, 0));
 
     // This will bring the canvas into the screen coordinate system for the
     // dirty rect
-    canvas->translate(SkIntToScalar(-ps_.rcPaint.left),
-                      SkIntToScalar(-ps_.rcPaint.top));
+    canvas->translate(
+        SkScalarRoundToInt(-ps_.rcPaint.left/ui::win::GetDeviceScaleFactor()),
+        SkScalarRoundToInt(-ps_.rcPaint.top/ui::win::GetDeviceScaleFactor()));
   }
 
   // If true, this canvas was created for a BeginPaint.
   const bool for_paint_;
 
   // Disallow copy and assign.
   CanvasSkiaPaint(const CanvasSkiaPaint&);
   CanvasSkiaPaint& operator=(const CanvasSkiaPaint&);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_CANVAS_PAINT_WIN_H_