Expose SkPicture::numSlowPaths() in the public API.

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index eb35ef636641abad12ab9a067b5a7e9ae9bdfba6..c86772b1245d8ad1bc28fa8b02f59b63039da010 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -168,6 +168,9 @@ public:
     static void SetPictureIOSecurityPrecautionsEnabled_Dangerous(bool set);
     static bool PictureIOSecurityPrecautionsEnabled();
 
+    // Number of drawpath and clippath calls which may be slow to draw on the GPU without MSAA.
+    virtual int numSlowPaths() const = 0;
+
 #ifdef SK_SUPPORT_LEGACY_PICTURE_PTR
     static SkPicture* CreateFromStream(SkStream* stream, InstallPixelRefProc proc) {
         return MakeFromStream(stream, proc).release();
@@ -191,8 +194,6 @@ private:
     static sk_sp<SkPicture> MakeFromStream(SkStream*, InstallPixelRefProc, SkTypefacePlayback*);
     friend class SkPictureData;
 
-    virtual int numSlowPaths() const = 0;
-    friend class SkPictureGpuAnalyzer;
     friend struct SkPathCounter;
 
     // V35: Store SkRect (rather then width & height) in header