Allow CanvasSkia to bind to an existing SkCanvas.

ui/gfx/render_text_linux.cc

Index: ui/gfx/render_text_linux.cc
diff --git a/ui/gfx/render_text_linux.cc b/ui/gfx/render_text_linux.cc
index d744a941a89f9df8bae8de5ca7e7838c8bc9ab67..92af95e6d97bf8d4c61bf51c2d716b003850575d 100644
--- a/ui/gfx/render_text_linux.cc
+++ b/ui/gfx/render_text_linux.cc
@@ -94,7 +94,7 @@ void RenderTextLinux::Draw(Canvas* canvas) {
   Rect bounds(display_rect());
 
   // Clip the canvas to the text display area.
-  CanvasSkia* canvas_skia = canvas->AsCanvasSkia();
+  SkCanvas* canvas_skia = canvas->GetSkCanvas();
 
   skia::ScopedPlatformPaint scoped_platform_paint(canvas_skia);
   cairo_t* cr = scoped_platform_paint.GetPlatformSurface();
@@ -498,7 +498,7 @@ SelectionModel RenderTextLinux::RightSelectionModelByWord(
 PangoLayout* RenderTextLinux::EnsureLayout() {
   if (layout_ == NULL) {
     CanvasSkia canvas(display_rect().width(), display_rect().height(), false);
-    skia::ScopedPlatformPaint scoped_platform_paint(&canvas);
+    skia::ScopedPlatformPaint scoped_platform_paint(canvas.sk_canvas());
     cairo_t* cr = scoped_platform_paint.GetPlatformSurface();
 
     layout_ = pango_cairo_create_layout(cr);