O3D Mac: Add CoreAnimation support

plugin/mac/plugin_mac.mm

Index: plugin/mac/plugin_mac.mm
===================================================================
--- plugin/mac/plugin_mac.mm	(revision 44394)
+++ plugin/mac/plugin_mac.mm	(working copy)
@@ -40,7 +40,9 @@
 #include "plugin/cross/main.h"
 #include "core/mac/display_window_mac.h"
 #include "plugin/mac/graphics_utils_mac.h"
+#import "plugin/mac/o3d_layer.h"
 
+
 #if !defined(O3D_INTERNAL_PLUGIN)
 BreakpadRef gBreakpadRef =  NULL;
 #endif
@@ -236,6 +238,15 @@
     NPP instance = instances_[i];
     PluginObject* obj = static_cast<PluginObject*>(instance->pdata);
 
+    if (obj->drawing_model_ == NPDrawingModelCoreAnimation) {
+      O3DLayer* o3dLayer = static_cast<O3DLayer*>(obj->gl_layer_);
+      if (o3dLayer) {
+        obj->client()->Tick();
+        [o3dLayer setNeedsDisplay];
+      }
+      return;
+    }
+
     ManageSafariTabSwitching(obj);
     obj->client()->Tick();