Windowless plugins: basic drawing works.

skia/ext/platform_device_linux.h

Index: skia/ext/platform_device_linux.h
diff --git a/skia/ext/platform_device_linux.h b/skia/ext/platform_device_linux.h
index 5c16c08ac631bec0507aefd2033cc5ba2de5499e..9daeb702f6a19f7d44dba0943897e41aeacf2ff1 100644
--- a/skia/ext/platform_device_linux.h
+++ b/skia/ext/platform_device_linux.h
@@ -15,6 +15,15 @@ class PlatformDeviceLinux : public SkDevice {
   // Returns if the preferred rendering engine is vectorial or bitmap based.
   virtual bool IsVectorial() = 0;
 
+  // An X drawable.  Avoid pulling in all of Xlib by typedef'ing.
+  typedef unsigned long XDrawable;
+
+  // Gets an X drawable that maps onto the drawing surface.
+  // This has the potential of being exceedingly slow; drawables are server-side
+  // but skia drawables are client-side, so we must copy all the data back and
+  // forth.  Only used for plugin drawing.
+  virtual XDrawable GetXDrawable() = 0;
+
  protected:
   // Forwards |bitmap| to SkDevice's constructor.
   PlatformDeviceLinux(const SkBitmap& bitmap);