Switch from using GdkPixbuf to cairo for painting on Drawables.

skia/include/corecg/SkUserConfig.h

Index: skia/include/corecg/SkUserConfig.h
diff --git a/skia/include/corecg/SkUserConfig.h b/skia/include/corecg/SkUserConfig.h
index a9d4fea47ea908b9ab00ead93658afc76d35340c..2a646ce6bfff7b3424cc568794f6cb9fdc8e7d97 100644
--- a/skia/include/corecg/SkUserConfig.h
+++ b/skia/include/corecg/SkUserConfig.h
@@ -116,6 +116,26 @@ typedef unsigned uint32_t;
 #define SK_G32_SHIFT    8
 #define SK_B32_SHIFT    16
 
+#elif defined(SK_BUILD_FOR_UNIX)
+
+#ifdef SK_CPU_BENDIAN
+// Below we set the order for ARGB channels in registers. I suspect that, on
+// big endian machines, you can keep this the same and everything will work.
+// The in-memory order will be different, of course, but as long as everything
+// is reading memory as words rather than bytes, it will all work. However, if
+// you find that colours are messed up I thought that I would leave a helpful
+// locator for you. Also see the comments in
+// base/gfx/bitmap_platform_device_linux.h
+#error Read the comment at this location
+#endif
+
+// For Linux we want to match the most common X visual, which is
+// ARGB (in registers)
+#define SK_A32_SHIFT 24
+#define SK_R32_SHIFT 16
+#define SK_G32_SHIFT 8
+#define SK_B32_SHIFT 0
+
 #endif
 
 // Don't use skia debug mode even when compiled as debug, because we don't