Move StringView constructors into WTFString.h/AtomicString.h

third_party/WebKit/Source/wtf/text/AtomicString.h

Index: third_party/WebKit/Source/wtf/text/AtomicString.h
diff --git a/third_party/WebKit/Source/wtf/text/AtomicString.h b/third_party/WebKit/Source/wtf/text/AtomicString.h
index 7345d827ab8fca6edbb485dad54be5dd05b369e2..b2a8e54bbf49c70607306ced6bb398007ce114f5 100644
--- a/third_party/WebKit/Source/wtf/text/AtomicString.h
+++ b/third_party/WebKit/Source/wtf/text/AtomicString.h
@@ -25,6 +25,7 @@
 #include "wtf/HashTableDeletedValueType.h"
 #include "wtf/WTFExport.h"
 #include "wtf/text/CString.h"
+#include "wtf/text/StringView.h"
 #include "wtf/text/WTFString.h"
 #include <cstring>
 #include <iosfwd>
@@ -206,6 +207,13 @@ template<> struct DefaultHash<AtomicString> {
 // double-quotes, and escapes chracters other than ASCII printables.
 WTF_EXPORT std::ostream& operator<<(std::ostream&, const AtomicString&);
 
+inline StringView::StringView(const AtomicString& string, unsigned offset, unsigned length)
+    : StringView(string.impl(), offset, length) {}
+inline StringView::StringView(const AtomicString& string, unsigned offset)
+    : StringView(string.impl(), offset) {}
+inline StringView::StringView(const AtomicString& string)
+    : StringView(string.impl()) {}
+
 } // namespace WTF
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(AtomicString);