Hash: rename getHexDigest to asString

src/Hash.h

@@ -26,7 +26,7 @@ struct Hash : protected MurMurHash3 {
         }
 
 
-        std::string getHexDigest() const {
+        std::string asString() const {
             std::stringstream ss;
             for (unsigned i = 0; i < DIGEST_WORDS; i++) {
                 ss << std::hex << std::setfill('0') << std::setw(8)

src/hash-visitor.cc

@@ -15,7 +15,7 @@ string HashVisitor::GetHash(unsigned *processed_bytes) {
     if (processed_bytes) {
         *processed_bytes = hash.length;
     }
-    return hash.getHexDigest();
+    return hash.asString();
 }
 
 /// Declarations