Trim leading and trailing whitespace from stored CSP headers.

third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp

Index: third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
diff --git a/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp b/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
index 99a69abd80c5d91dbfa50940d6349e3128c9d305..8a75b0035175a2da7a08f846bad2f26b48bac2ae 100644
--- a/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
+++ b/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.cpp
@@ -809,7 +809,7 @@ bool CSPDirectiveList::shouldSendCSPHeader(Resource::Type type) const {
 // directive-list    = [ directive *( ";" [ directive ] ) ]
 //
 void CSPDirectiveList::parse(const UChar* begin, const UChar* end) {
-  m_header = String(begin, end - begin);
+  m_header = String(begin, end - begin).stripWhiteSpace();
 
   if (begin == end)
     return;