Add FetchUtils::normalizeHeaderValue( )

third_party/WebKit/Source/core/fetch/FetchUtils.cpp

Index: third_party/WebKit/Source/core/fetch/FetchUtils.cpp
diff --git a/third_party/WebKit/Source/core/fetch/FetchUtils.cpp b/third_party/WebKit/Source/core/fetch/FetchUtils.cpp
index 4139db3f4428bb32a9a66747453e79fd4ffcbf12..72b4429f64535ae6e0a38e8615ddeec5bf046280 100644
--- a/third_party/WebKit/Source/core/fetch/FetchUtils.cpp
+++ b/third_party/WebKit/Source/core/fetch/FetchUtils.cpp
@@ -16,6 +16,11 @@ namespace blink {
 
 namespace {
 
+bool isHTTPWhitespace(UChar chr)
+{
+    return chr == ' ' || chr == '\n' || chr == '\t' || chr == '\r';
+}
+
 class ForbiddenHeaderNames {
     WTF_MAKE_NONCOPYABLE(ForbiddenHeaderNames); WTF_MAKE_FAST_ALLOCATED(ForbiddenHeaderNames);
 public:
@@ -189,4 +194,13 @@ AtomicString FetchUtils::normalizeMethod(const AtomicString& method)
     return method;
 }
 
+String FetchUtils::normalizeHeaderValue(const String& value)
+{
+    // https://fetch.spec.whatwg.org/#concept-header-value-normalize
+    // Strip leading and trailing whitespace from header value.
+    // HTTP whitespace bytes are 0x09, 0x0A, 0x0D, and 0x20.
+
+    return value.stripWhiteSpace(isHTTPWhitespace);
+}
+
 } // namespace blink