Revert "Change call-sites now that SkCanvas is not ref-counted"

ui/gfx/canvas.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 "ui/gfx/canvas.h"
 
 #include <cmath>
 #include <limits>
 
 #include "base/i18n/rtl.h"
@@ skipping 10 matching lines @@
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/scoped_canvas.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/gfx/transform.h"
 
 namespace gfx {
 
 Canvas::Canvas(const Size& size, float image_scale, bool is_opaque)
     : image_scale_(image_scale) {
   Size pixel_size = ScaleToCeiledSize(size, image_scale);
-  canvas_owner_ = skia::CreatePlatformCanvas(pixel_size.width(),
-                                             pixel_size.height(), is_opaque);
-  canvas_ = canvas_owner_.get();
-
+  canvas_ = sk_sp<SkCanvas>(skia::CreatePlatformCanvas(pixel_size.width(),
+                                                       pixel_size.height(),
+                                                       is_opaque));
 #if !defined(USE_CAIRO)
   // skia::PlatformCanvas instances are initialized to 0 by Cairo, but
   // uninitialized on other platforms.
   if (!is_opaque)
     canvas_->clear(SkColorSetARGB(0, 0, 0, 0));
 #endif
 
   SkScalar scale_scalar = SkFloatToScalar(image_scale);
   canvas_->scale(scale_scalar, scale_scalar);
 }
 
 Canvas::Canvas()
     : image_scale_(1.f),
-      canvas_owner_(skia::CreatePlatformCanvas(0, 0, false)),
-      canvas_(canvas_owner_.get()) {}
+      canvas_(sk_sp<SkCanvas>(skia::CreatePlatformCanvas(0, 0, false))) {}
 
-Canvas::Canvas(SkCanvas* canvas, float image_scale)
-    : image_scale_(image_scale), canvas_(canvas) {
+Canvas::Canvas(sk_sp<SkCanvas> canvas, float image_scale)
+    : image_scale_(image_scale), canvas_(std::move(canvas)) {
   DCHECK(canvas_);
 }
 
 Canvas::~Canvas() {
 }
 
 void Canvas::RecreateBackingCanvas(const Size& size,
                                    float image_scale,
                                    bool is_opaque) {
   image_scale_ = image_scale;
   Size pixel_size = ScaleToFlooredSize(size, image_scale);
-  canvas_owner_ = skia::CreatePlatformCanvas(pixel_size.width(),
-                                             pixel_size.height(), is_opaque);
-  canvas_ = canvas_owner_.get();
-
+  canvas_ = sk_sp<SkCanvas>(skia::CreatePlatformCanvas(pixel_size.width(),
+                                                       pixel_size.height(),
+                                                       is_opaque));
   SkScalar scale_scalar = SkFloatToScalar(image_scale);
   canvas_->scale(scale_scalar, scale_scalar);
 }
 
 // static
 void Canvas::SizeStringInt(const base::string16& text,
                            const FontList& font_list,
                            int* width,
                            int* height,
                            int line_height,
@@ skipping 523 matching lines @@
   p.setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
   p.setShader(CreateImageRepShaderForScale(
       image_rep, SkShader::kRepeat_TileMode, shader_scale,
       remove_image_scale ? image_rep.scale() : 1.f));
 
   // The rect will be filled by the bitmap.
   canvas_->drawRect(dest_rect, p);
 }
 
 }  // namespace gfx