Fix ImageFilter fuzzer issue

src/core/SkValidatingReadBuffer.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkErrorInternals.h"
 #include "SkValidatingReadBuffer.h"
@@ skipping 127 matching lines @@
     }
 }
 
 void SkValidatingReadBuffer::readRect(SkRect* rect) {
     const void* ptr = this->skip(sizeof(SkRect));
     if (!fError) {
         memcpy(rect, ptr, sizeof(SkRect));
     }
 }
 
+void SkValidatingReadBuffer::readRRect(SkRRect* rrect) {
+    const void* ptr = this->skip(sizeof(SkRRect));
+    if (!fError) {
+        memcpy(rrect, ptr, sizeof(SkRRect));
+    }
+}
+
 void SkValidatingReadBuffer::readRegion(SkRegion* region) {
     size_t size = 0;
     if (!fError) {
         size = region->readFromMemory(fReader.peek(), fReader.available());
         this->validate((SkAlign4(size) == size) && (0 != size));
     }
     if (!fError) {
         (void)this->skip(size);
     }
 }
@@ skipping 102 matching lines @@
 
 void SkValidatingReadBuffer::skipFlattenable() {
     SkString name;
     this->readString(&name);
     if (fError) {
         return;
     }
     uint32_t sizeRecorded = this->readUInt();
     this->skip(sizeRecorded);
 }