Use sse4.2 CRC32 instructions to hash when available.

tools/UrlDataManager.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkUrlDataManager_DEFINED
 #define SkUrlDataManager_DEFINED
 
-#include "SkChecksum.h"
 #include "SkData.h"
+#include "SkOpts.h"
 #include "SkString.h"
 #include "SkTDynamicHash.h"
 
 /*
  * A simple class which allows clients to add opaque data types, and returns a url where this data
  * will be hosted.  Its up to the owner of this class to actually serve the data.
  */
 bool operator==(const SkData& a, const SkData& b);
 
 class UrlDataManager {
@@ skipping 22 matching lines @@
     void reset();
 
 private:
     struct LookupTrait {
         // We use the data as a hash, this is not really optimal but is fine until proven otherwise
         static const SkData& GetKey(const UrlData& data) {
             return *data.fData.get();
         }
 
         static uint32_t Hash(const SkData& key) {
-            return SkChecksum::Murmur3(key.bytes(), key.size());
+            return SkOpts::hash(key.bytes(), key.size());
         }
     };
 
     struct ReverseLookupTrait {
         static const SkString& GetKey(const UrlData& data) {
             return data.fUrl;
         }
 
         static uint32_t Hash(const SkString& key) {
-            return SkChecksum::Murmur3(key.c_str(), strlen(key.c_str()));
+            return SkOpts::hash(key.c_str(), strlen(key.c_str()));
         }
     };
 
 
     SkString fRootUrl;
     SkTDynamicHash<UrlData, SkData, LookupTrait> fCache;
     SkTDynamicHash<UrlData, SkString, ReverseLookupTrait> fUrlLookup;
     uint32_t fDataId;
 };
 
 #endif