Enable srcset support in HTMLImageElement

Source/core/platform/ParsingUtilities.h

Index: Source/core/platform/ParsingUtilities.h
diff --git a/Source/core/platform/ParsingUtilities.h b/Source/core/platform/ParsingUtilities.h
new file mode 100644
index 0000000000000000000000000000000000000000..dbd9dca64a150612edc792b43f10336230b740cd
--- /dev/null
+++ b/Source/core/platform/ParsingUtilities.h
@@ -0,0 +1,50 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ParsingUtilities_h
+#define ParsingUtilities_h
+
+template<typename CharType>
+bool skipExactly(const CharType*& position, const CharType* end, CharType delimiter)
+{
+    if (position < end && *position == delimiter) {
+        ++position;
+        return true;
+    }
+    return false;
+}
+
+template<typename CharType, bool characterPredicate(CharType)>

[cbiesinger, 2013/09/19 23:01:44]

Couldn't you make CharType the second template argument, so that the compiler
can automatically deduct the value for CharType? 

[abarth-chromium, 2013/09/20 16:08:07]

+1

+bool skipExactly(const CharType*& position, const CharType* end)
+{
+    if (position < end && characterPredicate(*position)) {
+        ++position;
+        return true;
+    }
+    return false;
+}
+
+template<typename CharType>
+void skipUntil(const CharType*& position, const CharType* end, CharType delimiter)
+{
+    while (position < end && *position != delimiter)
+        ++position;
+}
+
+template<typename CharType, bool characterPredicate(CharType)>
+void skipUntil(const CharType*& position, const CharType* end)
+{
+    while (position < end && !characterPredicate(*position))
+        ++position;
+}
+
+template<typename CharType, bool characterPredicate(CharType)>
+void skipWhile(const CharType*& position, const CharType* end)
+{
+    while (position < end && characterPredicate(*position))
+        ++position;
+}
+
+#endif
+