Custom handlers should throw SecurityError exception if the URL's origin differs from the document'…

Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp

Index: Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
diff --git a/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp b/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
index 78f997f460740a83bfee8c71d53877c4fae8c526..308fa54bdad7a2fe9b04c0fc162fd310fe0d1d1b 100644
--- a/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
+++ b/Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp
@@ -68,7 +68,7 @@ static void initProtocolHandlerWhitelist()
         protocolWhitelist->add(protocols[i]);
 }
 
-static bool verifyCustomHandlerURL(const KURL& baseURL, const String& url, ExceptionState& exceptionState)
+static bool verifyCustomHandlerURL(const Document& document, const String& url, ExceptionState& exceptionState)
 {
     // The specification requires that it is a SyntaxError if the "%s" token is
     // not present.
@@ -84,6 +84,7 @@ static bool verifyCustomHandlerURL(const KURL& baseURL, const String& url, Excep
     String newURL = url;
     newURL.remove(index, WTF_ARRAY_LENGTH(token) - 1);
 
+    KURL baseURL = document.baseURL();
     KURL kurl(baseURL, newURL);
 
     if (kurl.isEmpty() || !kurl.isValid()) {
@@ -91,6 +92,12 @@ static bool verifyCustomHandlerURL(const KURL& baseURL, const String& url, Excep
         return false;
     }
 
+    // The specification says that the API throws SecurityError exception if the URL's origin differs from the document's origin.
+    if (!document.securityOrigin()->canRequest(kurl)) {
+        exceptionState.throwSecurityError("Can only register custom handler in the document's origin.");
+        return false;
+    }
+
     return true;
 }
 
@@ -149,17 +156,17 @@ void NavigatorContentUtils::registerProtocolHandler(Navigator& navigator, const
     if (!navigator.frame())
         return;
 
-    ASSERT(navigator.frame()->document());
-    KURL baseURL = navigator.frame()->document()->baseURL();
+    Document* document = navigator.frame()->document();
+    ASSERT(document);
 
-    if (!verifyCustomHandlerURL(baseURL, url, exceptionState))
+    if (!verifyCustomHandlerURL(*document, url, exceptionState))
         return;
 
     if (!verifyCustomHandlerScheme(scheme, exceptionState))
         return;
 
     ASSERT(navigator.frame()->page());
-    NavigatorContentUtils::from(*navigator.frame()->page())->client()->registerProtocolHandler(scheme, baseURL, KURL(ParsedURLString, url), title);
+    NavigatorContentUtils::from(*navigator.frame()->page())->client()->registerProtocolHandler(scheme, document->baseURL(), KURL(ParsedURLString, url), title);
 }
 
 static String customHandlersStateString(const NavigatorContentUtilsClient::CustomHandlersState state)
@@ -193,16 +200,14 @@ String NavigatorContentUtils::isProtocolHandlerRegistered(Navigator& navigator,
     if (document->activeDOMObjectsAreStopped())
         return declined;
 
-    KURL baseURL = document->baseURL();
-
-    if (!verifyCustomHandlerURL(baseURL, url, exceptionState))
+    if (!verifyCustomHandlerURL(*document, url, exceptionState))
         return declined;
 
     if (!verifyCustomHandlerScheme(scheme, exceptionState))
         return declined;
 
     ASSERT(navigator.frame()->page());
-    return customHandlersStateString(NavigatorContentUtils::from(*navigator.frame()->page())->client()->isProtocolHandlerRegistered(scheme, baseURL, KURL(ParsedURLString, url)));
+    return customHandlersStateString(NavigatorContentUtils::from(*navigator.frame()->page())->client()->isProtocolHandlerRegistered(scheme, document->baseURL(), KURL(ParsedURLString, url)));
 }
 
 void NavigatorContentUtils::unregisterProtocolHandler(Navigator& navigator, const String& scheme, const String& url, ExceptionState& exceptionState)
@@ -210,17 +215,17 @@ void NavigatorContentUtils::unregisterProtocolHandler(Navigator& navigator, cons
     if (!navigator.frame())
         return;
 
-    ASSERT(navigator.frame()->document());
-    KURL baseURL = navigator.frame()->document()->baseURL();
+    Document* document = navigator.frame()->document();
+    ASSERT(document);
 
-    if (!verifyCustomHandlerURL(baseURL, url, exceptionState))
+    if (!verifyCustomHandlerURL(*document, url, exceptionState))
         return;
 
     if (!verifyCustomHandlerScheme(scheme, exceptionState))
         return;
 
     ASSERT(navigator.frame()->page());
-    NavigatorContentUtils::from(*navigator.frame()->page())->client()->unregisterProtocolHandler(scheme, baseURL, KURL(ParsedURLString, url));
+    NavigatorContentUtils::from(*navigator.frame()->page())->client()->unregisterProtocolHandler(scheme, document->baseURL(), KURL(ParsedURLString, url));
 }
 
 const char* NavigatorContentUtils::supplementName()