Remove clip/matrix effects from CanvasResourceProvider::WritePixels

With the new RasterInterface::WritePixels API we can now upload pixels
directly to textures through RasterInterface without creating paint ops
for mailbox backed shared images. This CL modifies existing code to
prepare to use the new API. A follow up CL will actually hook up the new
API for CanvasResourceProviderSharedImage.

Bug: 1063725
Change-Id: Id5cd411e94d1fd8721d5491673f6120bcd6ed33c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2210738
Commit-Queue: Khushal <khushalsagar@chromium.org>
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#771922}

third_party/blink/renderer/platform/graphics/canvas_resource_provider.cc

@@ -1361,14 +1361,6 @@ bool CanvasResourceProvider::WritePixels(const SkImageInfo& orig_info,
 
   EnsureSkiaCanvas();
 
-  // Apply clipstack to skia_canvas_ and then restore it to original state once
-  // we leave this scope. This is needed because each recording initializes and
-  // resets this state after every flush. restore_clip_stack_callback_ sets the
-  // initial save required for a restore.
-  cc::PaintCanvasAutoRestore auto_restore(skia_canvas_.get(), false);
-  if (restore_clip_stack_callback_)
-    restore_clip_stack_callback_.Run(skia_canvas_.get());
-
   return GetSkSurface()->getCanvas()->writePixels(orig_info, pixels, row_bytes,
                                                   x, y);
 }