Basic windowless plugins, try 2.

skia/ext/platform_canvas_linux.cc

 // Copyright (c) 2006-2008 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 "skia/ext/platform_canvas_linux.h"
 
 #include "skia/ext/platform_device_linux.h"
 #include "skia/ext/bitmap_platform_device_linux.h"
 #include "SkTypes.h"
 
@@ skipping 35 matching lines @@
   SkDevice* device =
     BitmapPlatformDeviceLinux::Create(width, height, is_opaque, data);
   if (!device)
     return false;
 
   setDevice(device);
   device->unref(); // was created with refcount 1, and setDevice also refs
   return true;
 }
 
+cairo_surface_t* PlatformCanvasLinux::beginPlatformPaint() {
+  return getTopPlatformDevice().beginPlatformPaint();
+}
+
 PlatformDeviceLinux& PlatformCanvasLinux::getTopPlatformDevice() const {
   // All of our devices should be our special PlatformDevice.
   SkCanvas::LayerIter iter(const_cast<PlatformCanvasLinux*>(this), false);
   return *static_cast<PlatformDeviceLinux*>(iter.device());
 }
 
 SkDevice* PlatformCanvasLinux::createDevice(SkBitmap::Config config,
                                             int width,
                                             int height,
                                             bool is_opaque, bool isForLayer) {
   SkASSERT(config == SkBitmap::kARGB_8888_Config);
   return createPlatformDevice(width, height, is_opaque);
 }
 
 SkDevice* PlatformCanvasLinux::createPlatformDevice(int width,
                                                     int height,
                                                     bool is_opaque) {
   return BitmapPlatformDeviceLinux::Create(width, height, is_opaque);
 }
 
 // static
 size_t PlatformCanvasLinux::StrideForWidth(unsigned width) {
   return cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
 }
 
 }  // namespace skia