Cleanup a few loops into the new C++11 for-each style.

Source/core/frame/SubresourceIntegrity.cpp

Index: Source/core/frame/SubresourceIntegrity.cpp
diff --git a/Source/core/frame/SubresourceIntegrity.cpp b/Source/core/frame/SubresourceIntegrity.cpp
index ac8d38f0e5ff0ad54ed9dda26bdb389f2c1cf0a4..0e041528d1f6cfa6a5db2bee128e5e2e9caf9afa 100644
--- a/Source/core/frame/SubresourceIntegrity.cpp
+++ b/Source/core/frame/SubresourceIntegrity.cpp
@@ -63,13 +63,9 @@ static String algorithmToString(HashAlgorithm algorithm)
         {  HashAlgorithmSha512, "SHA-512" }
     };
 
-    // See comment in parseIntegrityAttribute about why sizeof() is used
-    // instead of WTF_ARRAY_LENGTH.
-    size_t i = 0;
-    size_t kSupportedAlgorithmsLength = sizeof(kAlgorithmToString) / sizeof(kAlgorithmToString[0]);
-    for (; i < kSupportedAlgorithmsLength; i++) {
-        if (kAlgorithmToString[i].algorithm == algorithm)
-            return kAlgorithmToString[i].name;
+    for (const auto& algorithmToString : kAlgorithmToString) {
+        if (algorithmToString.algorithm == algorithm)
+            return algorithmToString.name;
     }
 
     ASSERT_NOT_REACHED();