Make SkOSWindow return the sample count and stencil bit count for its GL context.

include/views/SkOSWindow_NaCl.h

 
 /*
  * Copyright 2012 Skia
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkOSWindow_NaCl_DEFINED
 #define SkOSWindow_NaCl_DEFINED
 
 #include "SkWindow.h"
 
 class SkIRect;
 
 class SkOSWindow : public SkWindow {
 public:
     SkOSWindow(void*) {}
     ~SkOSWindow() {}
 
     enum SkBackEndTypes {
         kNone_BackEndType,
         kNativeGL_BackEndType,
     };
 
-    bool attach(SkBackEndTypes /* attachType */, int /* msaaSampleCount */) {
+    struct AttachmentInfo {
+        int fSampleCount;
+        int fStencilBits;
+    };
+
+    bool attach(SkBackEndTypes /* attachType */, int /* msaaSampleCount */, AttachmentInfo* info) {
+        info->fSampleCount = 0;
+        info->fStencilBits = 0;
         return true;
     }
     void detach() {}
     void present() {}
 
     virtual void onPDFSaved(const char title[], const char desc[],
         const char path[]);
 
 protected:
     // overrides from SkWindow
     virtual void onHandleInval(const SkIRect&);
     virtual void onSetTitle(const char title[]);
 
 private:
     typedef SkWindow INHERITED;
 };
 
 #endif