ui: Introduce CanvasPainter, remove PaintContext(gfx::Canvas*).

ui/views/controls/textfield/textfield.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/controls/textfield/textfield.h"
 
 #include <string>
 
 #include "base/trace_event/trace_event.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/drag_utils.h"
 #include "ui/base/touch/selection_bound.h"
 #include "ui/base/ui_base_switches_util.h"
-#include "ui/compositor/paint_context.h"
+#include "ui/compositor/canvas_painter.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
 #include "ui/events/event.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/screen.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/strings/grit/ui_strings.h"
 #include "ui/views/background.h"
@@ skipping 1047 matching lines @@
       GetDisplayNearestWindow(native_view);
   size.SetToMin(gfx::Size(display.size().width(), height()));
   label.SetBoundsRect(gfx::Rect(size));
   scoped_ptr<gfx::Canvas> canvas(
       GetCanvasForDragImage(GetWidget(), label.size()));
   label.SetEnabledColor(GetTextColor());
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   // Desktop Linux Aura does not yet support transparency in drag images.
   canvas->DrawColor(GetBackgroundColor());
 #endif
-  label.Paint(ui::PaintContext(canvas.get()));
+  label.Paint(ui::CanvasPainter(canvas.get(), 1.f).context());
   const gfx::Vector2d kOffset(-15, 0);
   drag_utils::SetDragImageOnDataObject(*canvas, kOffset, data);
   if (controller_)
     controller_->OnWriteDragData(data);
 }
 
 int Textfield::GetDragOperationsForView(View* sender, const gfx::Point& p) {
   int drag_operations = ui::DragDropTypes::DRAG_COPY;
   if (!enabled() || text_input_type_ == ui::TEXT_INPUT_TYPE_PASSWORD ||
       !GetRenderText()->IsPointInSelection(p)) {
@@ skipping 796 matching lines @@
     RequestFocus();
   model_->MoveCursorTo(mouse);
   if (!selection_clipboard_text.empty()) {
     model_->InsertText(selection_clipboard_text);
     UpdateAfterChange(true, true);
   }
   OnAfterUserAction();
 }
 
 }  // namespace views