Bump picture version for uniqueID-less SkImageFilter.

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 346d65bd467106e8c12adc9302779702e74569bd..a62bedbfdbd7848c5e7b9ec064e2d97d129a9df3 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -243,13 +243,14 @@ private:
     // V37: Added shadow only option to SkDropShadowImageFilter (last version to record CLEAR)
     // V38: Added PictureResolution option to SkPictureImageFilter
     // V39: Added FilterLevel option to SkPictureImageFilter
+    // V40: Remove UniqueID serialization from SkImageFilter.
 
     // Note: If the picture version needs to be increased then please follow the
     // steps to generate new SKPs in (only accessible to Googlers): http://goo.gl/qATVcw
 
     // Only SKPs within the min/current picture version range (inclusive) can be read.
     static const uint32_t MIN_PICTURE_VERSION = 35;     // Produced by Chrome M39.
-    static const uint32_t CURRENT_PICTURE_VERSION = 39;
+    static const uint32_t CURRENT_PICTURE_VERSION = 40;
 
     void createHeader(SkPictInfo* info) const;
     static bool IsValidPictInfo(const SkPictInfo& info);