Fix ImageFilter fuzzer issue

src/core/SkReadBuffer.h

Index: src/core/SkReadBuffer.h
diff --git a/src/core/SkReadBuffer.h b/src/core/SkReadBuffer.h
index faf853aef5430124c7f916636804c88fa6eb4df1..732ede10ad6bff930ec20f0d757f36dad3d031a1 100644
--- a/src/core/SkReadBuffer.h
+++ b/src/core/SkReadBuffer.h
@@ -101,6 +101,9 @@ public:
     size_t offset() { return fReader.offset(); }
     bool eof() { return fReader.eof(); }
     virtual const void* skip(size_t size) { return fReader.skip(size); }
+
+    void setOffset(size_t offset) { fReader.setOffset(offset); }
+
     void* readFunctionPtr() { return fReader.readPtr(); }
 
     // primitives
@@ -121,6 +124,7 @@ public:
     virtual void readMatrix(SkMatrix* matrix);
     virtual void readIRect(SkIRect* rect);
     virtual void readRect(SkRect* rect);
+    virtual void readRRect(SkRRect* rrect);
     virtual void readRegion(SkRegion* region);
 
     virtual void readPath(SkPath* path);
@@ -205,6 +209,7 @@ public:
     // Default impelementations don't check anything.
     virtual bool validate(bool isValid) { return true; }
     virtual bool isValid() const { return true; }
+    virtual void makeInvalid() { }

[reed1, 2016/04/19 12:54:11]

is this still needed?

[robertphillips, 2016/04/19 14:34:42]

Done.

     virtual bool validateAvailable(size_t size) { return true; }
 
 protected: