Add Skia to CG adapter for plugins.

content/plugin/webplugin_proxy.cc

Index: content/plugin/webplugin_proxy.cc
===================================================================
--- content/plugin/webplugin_proxy.cc	(revision 81254)
+++ content/plugin/webplugin_proxy.cc	(working copy)
@@ -350,7 +350,7 @@
     CGContextClearRect(windowless_context_, rect.ToCGRect());
   }
   CGContextClipToRect(windowless_context_, rect.ToCGRect());
-  delegate_->Paint(windowless_context_, rect);
+  delegate_->CGPaint(windowless_context_, rect);

[stuartmorgan, 2011/04/12 21:15:37]

This is another case where this whole codepath exists because of the fork
between CG and Skia; having CGPaint be public is a hack working around that.

I'm okay with you not fixing this for now (especially since this will need perf
testing when you unify it, and some tweaks like not drawing black or doing the
coordinate transforms on the Mac), but please put a TODO on this block for
unifying the Skia path.

[_cary, 2011/04/13 11:58:18]

Done.

   if (windowless_context_.get() == saved_context_weak)
     CGContextRestoreGState(windowless_context_);
 #else