skia: Add runtime option to disable picture IO security precautions

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 30e410cca35f406535589130722231543bc6abba..c0990855465427367b0acbee221d9318c2b9e166 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -153,6 +153,10 @@ public:
     // Returns NULL if this is not an SkBigPicture.
     virtual const SkBigPicture* asSkBigPicture() const { return NULL; }
 
+    // Global setting to enable or disable security precautions for serialization.
+    static void setPictureIOSecurityPrecautionsEnabled_Dangerous(bool set);
+    static bool pictureIOSecurityPrecautionsEnabled();
+
 private:
     // Subclass whitelist.
     SkPicture();