SRI: Accept dashed hash algorithms.

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 0e041528d1f6cfa6a5db2bee128e5e2e9caf9afa..b51c23247ebec398607dfe36460cc18d746ee9e0 100644
--- a/Source/core/frame/SubresourceIntegrity.cpp
+++ b/Source/core/frame/SubresourceIntegrity.cpp
@@ -168,7 +168,10 @@ bool SubresourceIntegrity::parseAlgorithm(const UChar*& position, const UChar* e
     } kSupportedPrefixes[] = {
         { "sha256", HashAlgorithmSha256 },
         { "sha384", HashAlgorithmSha384 },
-        { "sha512", HashAlgorithmSha512 }
+        { "sha512", HashAlgorithmSha512 },
+        { "sha-256", HashAlgorithmSha256 },

[jww, 2014/12/12 19:11:06]

If you're cool with it, I'd rather order the algorithms together (e.g. put the
SHA-256 prefixes together first). I think it would be easier to tell at a glance
what's going on.

+        { "sha-384", HashAlgorithmSha384 },
+        { "sha-512", HashAlgorithmSha512 }
     };
 
     for (auto& prefix : kSupportedPrefixes) {