Allow CanvasSkia to bind to an existing SkCanvas.

ui/gfx/render_text_win.cc

 // 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.
 
 #include "ui/gfx/render_text_win.h"
 
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
@@ skipping 82 matching lines @@
   RenderText::ApplyDefaultStyle();
   ItemizeLogicalText();
   LayoutVisualText(CreateCompatibleDC(NULL));
 }
 
 int RenderTextWin::GetStringWidth() {
   return string_width_;
 }
 
 void RenderTextWin::Draw(Canvas* canvas) {
-  skia::ScopedPlatformPaint scoped_platform_paint(canvas->AsCanvasSkia());
+  skia::ScopedPlatformPaint scoped_platform_paint(canvas->GetSkCanvas());
   HDC hdc = scoped_platform_paint.GetPlatformSurface();
   int saved_dc = SaveDC(hdc);
   DrawSelection(canvas);
   DrawVisualText(canvas);
   DrawCursor(canvas);
   RestoreDC(hdc, saved_dc);
 }
 
 SelectionModel RenderTextWin::FindCursorPosition(const Point& point) {
   if (text().empty())
@@ skipping 469 matching lines @@
       GetSubstringBounds(GetSelectionStart(), GetCursorPosition()));
   SkColor color = focused() ? kFocusedSelectionColor : kUnfocusedSelectionColor;
   for (std::vector<Rect>::const_iterator i = sel.begin(); i < sel.end(); ++i)
     canvas->FillRectInt(color, i->x(), i->y(), i->width(), i->height());
 }
 
 void RenderTextWin::DrawVisualText(Canvas* canvas) {
   if (text().empty())
     return;
 
-  CanvasSkia* canvas_skia = canvas->AsCanvasSkia();
+  SkCanvas* canvas_skia = canvas->GetSkCanvas();
   skia::ScopedPlatformPaint scoped_platform_paint(canvas_skia);
 
   Point offset(ToViewPoint(Point()));
   // TODO(msw): Establish a vertical baseline for strings of mixed font heights.
   size_t height = default_style().font.GetHeight();
   // Center the text vertically in the display area.
   offset.Offset(0, (display_rect().height() - height) / 2);
 
   SkPaint paint;
   paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
@@ skipping 34 matching lines @@
     canvas_skia->drawPosText(run->glyphs.get(), byte_length, pos.get(), paint);
 
     // Draw the strikethrough.
     if (run->strike) {
       Rect bounds(offset, Size(run->width, run->font.GetHeight()));
       SkPaint strike;
       strike.setAntiAlias(true);
       strike.setStyle(SkPaint::kFill_Style);
       strike.setColor(run->foreground);
       strike.setStrokeWidth(kStrikeWidth);
-      canvas->AsCanvasSkia()->drawLine(SkIntToScalar(bounds.x()),
-                                       SkIntToScalar(bounds.bottom()),
-                                       SkIntToScalar(bounds.right()),
-                                       SkIntToScalar(bounds.y()),
-                                       strike);
+      canvas->GetSkCanvas()->drawLine(SkIntToScalar(bounds.x()),
+                                      SkIntToScalar(bounds.bottom()),
+                                      SkIntToScalar(bounds.right()),
+                                      SkIntToScalar(bounds.y()),
+                                      strike);
     }
     offset.Offset(run->width, 0);
   }
 }
 
 void RenderTextWin::DrawCursor(Canvas* canvas) {
   // Paint cursor. Replace cursor is drawn as rectangle for now.
   // TODO(msw): Draw a better cursor with a better indication of association.
   if (cursor_visible() && focused()) {
     Rect r(GetUpdatedCursorBounds());
     canvas->DrawRectInt(kCursorColor, r.x(), r.y(), r.width(), r.height());
   }
 }
 
 RenderText* RenderText::CreateRenderText() {
   return new RenderTextWin;
 }
 
 }  // namespace gfx