Reland 4e4eae4cbe6136b538a: Make download item drags look like bookmark

ui/views/button_drag_utils.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/views/button_drag_utils.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/dragdrop/drag_utils.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 14 matching lines @@
 
 namespace button_drag_utils {
 
 // Maximum width of the link drag image in pixels.
 static const int kLinkDragImageMaxWidth = 150;
 
 void SetURLAndDragImage(const GURL& url,
                         const base::string16& title,
                         const gfx::ImageSkia& icon,
                         const gfx::Point* press_pt,
-                        ui::OSExchangeData* data,
-                        views::Widget* widget) {
-  DCHECK(url.is_valid() && data);
+                        const views::Widget& widget,
+                        ui::OSExchangeData* data) {
+  DCHECK(url.is_valid());
+  DCHECK(data);
   data->SetURL(url, title);
-  SetDragImage(url, title, icon, press_pt, data, widget);
+  SetDragImage(url, title, icon, press_pt, widget, data);
 }
 
 void SetDragImage(const GURL& url,
                   const base::string16& title,
                   const gfx::ImageSkia& icon,
                   const gfx::Point* press_pt,
-                  ui::OSExchangeData* data,
-                  views::Widget* widget) {
+                  const views::Widget& widget,
+                  ui::OSExchangeData* data) {
   // Create a button to render the drag image for us.
   views::LabelButton button(NULL,
                             title.empty() ? base::UTF8ToUTF16(url.spec())
                                           : title);
   button.SetTextSubpixelRenderingEnabled(false);
-  const ui::NativeTheme* theme = widget->GetNativeTheme();
+  const ui::NativeTheme* theme = widget.GetNativeTheme();
   button.SetTextColor(views::Button::STATE_NORMAL,
       theme->GetSystemColor(ui::NativeTheme::kColorId_TextfieldDefaultColor));
 
   SkColor bg_color = theme->GetSystemColor(
       ui::NativeTheme::kColorId_TextfieldDefaultBackground);
-  if (widget->IsTranslucentWindowOpacitySupported()) {
+  if (widget.IsTranslucentWindowOpacitySupported()) {
     button.SetTextShadows(gfx::ShadowValues(
         10, gfx::ShadowValue(gfx::Vector2d(0, 0), 2.0f, bg_color)));
   } else {
     button.set_background(views::Background::CreateSolidBackground(bg_color));
     button.SetBorder(button.CreateDefaultBorder());
   }
   button.SetMaxSize(gfx::Size(kLinkDragImageMaxWidth, 0));
   if (icon.isNull()) {
     button.SetImage(views::Button::STATE_NORMAL,
                     *ui::ResourceBundle::GetSharedInstance().GetImageNamed(
                         IDR_DEFAULT_FAVICON).ToImageSkia());
   } else {
     button.SetImage(views::Button::STATE_NORMAL, icon);
   }
 
   gfx::Size size(button.GetPreferredSize());
   button.SetBoundsRect(gfx::Rect(size));
 
   gfx::Vector2d press_point;
   if (press_pt)
     press_point = press_pt->OffsetFromOrigin();
   else
     press_point = gfx::Vector2d(size.width() / 2, size.height() / 2);
 
   SkBitmap bitmap;
-  float raster_scale = ScaleFactorForDragFromWidget(widget);
+  float raster_scale = ScaleFactorForDragFromWidget(&widget);
   SkColor color = SK_ColorTRANSPARENT;
   button.Paint(ui::CanvasPainter(&bitmap, size, raster_scale, color).context());
   gfx::ImageSkia image(gfx::ImageSkiaRep(bitmap, raster_scale));
   drag_utils::SetDragImageOnDataObject(image, press_point, data);
 }
 
 }  // namespace button_drag_utils