Add Skia to CG adapter for plugins.

webkit/plugins/npapi/webplugin_delegate_impl_mac.mm

Index: webkit/plugins/npapi/webplugin_delegate_impl_mac.mm
===================================================================
--- webkit/plugins/npapi/webplugin_delegate_impl_mac.mm	(revision 81254)
+++ webkit/plugins/npapi/webplugin_delegate_impl_mac.mm	(working copy)
@@ -37,6 +37,11 @@
 #include "webkit/plugins/npapi/quickdraw_drawing_manager_mac.h"
 #endif
 
+#if defined(USE_SKIA)
+#include "skia/ext/platform_canvas.h"
+#include "skia/ext/skia_utils_mac.h"
+#endif
+
 using WebKit::WebCursorInfo;
 using WebKit::WebKeyboardEvent;
 using WebKit::WebInputEvent;
@@ -469,6 +474,14 @@
 #endif
 }
 
+#if defined(USE_SKIA)
+void WebPluginDelegateImpl::Paint(WebKit::WebCanvas* canvas,

[stuartmorgan, 2011/04/12 17:35:51]

I don't suppose there's a less confusing way to do these defines? Having the #if
wrapping one function in the header and the other in the implementation looks
like a mistake; I had to read it a few times to understand that it wasn't.

[_cary, 2011/04/12 21:03:55]

Done.

+    const gfx::Rect& rect) {
+  gfx::SkiaBitLocker bitLocker(canvas);

[stuartmorgan, 2011/04/12 17:35:51]

Does this have the same transparency-preserving properties that the CG version
has, so that transparent plugins will composite correctly without the background
store?

[_cary, 2011/04/12 21:03:55]

Yes, the Skia bitmap preserves alpha so transparent compositing works.

+  Paint(bitLocker.cgContext(), rect);
+}
+#endif
+
 void WebPluginDelegateImpl::Print(CGContextRef context) {
   NOTIMPLEMENTED();
 }