Added validation of the policy specified in the 'csp' attribute

third_party/WebKit/Source/core/loader/FrameLoader.cpp

Index: third_party/WebKit/Source/core/loader/FrameLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameLoader.cpp b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
index 5bc3baacfc881129f9e342c99a4963cb7befe6e5..7cf55f7e43f92241a2cf32abcd4a7488d4fab27b 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
@@ -56,6 +56,7 @@
 #include "core/frame/LocalFrameClient.h"
 #include "core/frame/Settings.h"
 #include "core/frame/VisualViewport.h"
+#include "core/frame/csp/CSPDirectiveList.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLFrameOwnerElement.h"
@@ -1603,8 +1604,7 @@ void FrameLoader::ModifyRequestForCSP(ResourceRequest& resource_request,
                                       Document* document) const {
   if (RuntimeEnabledFeatures::embedderCSPEnforcementEnabled() &&
       !RequiredCSP().IsEmpty()) {
-    // TODO(amalika): Strengthen this DCHECK that requiredCSP has proper format
-    DCHECK(RequiredCSP().GetString().ContainsOnlyASCII());
+    DCHECK(CSPDirectiveList::IsValid(RequiredCSP().GetString()));
     resource_request.SetHTTPHeaderField(HTTPNames::Required_CSP, RequiredCSP());
   }