Allow CanvasSkia to bind to an existing SkCanvas.

views/controls/menu/menu_scroll_view_container.cc

Index: views/controls/menu/menu_scroll_view_container.cc
diff --git a/views/controls/menu/menu_scroll_view_container.cc b/views/controls/menu/menu_scroll_view_container.cc
index 1d3fcdd3a46b50e5450be678a12b3d6e0e0a8afa..cb52b41ed60dd598fe057547ec30e419cdcfb86d 100644
--- a/views/controls/menu/menu_scroll_view_container.cc
+++ b/views/controls/menu/menu_scroll_view_container.cc
@@ -86,7 +86,7 @@ class MenuScrollButton : public View {
     gfx::Rect item_bounds(0, 0, width(), height());
     NativeTheme::ExtraParams extra;
     extra.menu_item.is_selected = false;
-    NativeTheme::instance()->Paint(canvas->AsCanvasSkia(),
+    NativeTheme::instance()->Paint(canvas->GetSkCanvas(),
                                    NativeTheme::kMenuItemBackground,
                                    NativeTheme::kNormal, item_bounds, extra);
     SkColor arrow_color = color_utils::GetSysSkColor(COLOR_MENUTEXT);
@@ -186,7 +186,7 @@ void MenuScrollViewContainer::OnPaintBackground(gfx::Canvas* canvas) {
   HDC dc = canvas->BeginPlatformPaint();
   gfx::Rect bounds(0, 0, width(), height());
   NativeTheme::ExtraParams extra;
-  NativeTheme::instance()->Paint(canvas->AsCanvasSkia(),
+  NativeTheme::instance()->Paint(canvas->GetSkCanvas(),
       NativeTheme::kMenuPopupBackground, NativeTheme::kNormal, bounds, extra);
   canvas->EndPlatformPaint();
 #elif defined(OS_CHROMEOS)
@@ -219,8 +219,8 @@ void MenuScrollViewContainer::OnPaintBackground(gfx::Canvas* canvas) {
   canvas->DrawRectInt(0, 0, width(), height(), paint);
 #else
   // This is the same as COLOR_TOOLBAR.
-  canvas->AsCanvasSkia()->drawColor(SkColorSetRGB(210, 225, 246),
-                                    SkXfermode::kSrc_Mode);
+  canvas->GetSkCanvas()->drawColor(SkColorSetRGB(210, 225, 246),
+                                   SkXfermode::kSrc_Mode);
 #endif
 }