Add another suppression for bug 46658.

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
===================================================================
--- tools/heapcheck/suppressions.txt	(revision 49937)
+++ tools/heapcheck/suppressions.txt	(working copy)
@@ -656,7 +656,7 @@
 }
 
 {
-   bug_46658
+   bug_46658_a
    Heapcheck:Leak
    fun:WebCore::makeExternalString
    fun:WebCore::v8ExternalString
@@ -689,3 +689,38 @@
    fun:WebCore::MainResourceLoader::addData
    fun:WebCore::ResourceLoader::didReceiveData
 }
+
+{
+   bug_46658_b
+   Heapcheck:Leak
+   fun:WebCore::makeExternalString
+   fun:WebCore::v8ExternalString
+   fun:WebCore::v8String
+   fun:WebCore::V8DOMWindowShell::namedItemAdded
+   fun:WebCore::ScriptController::namedItemAdded
+   fun:WebCore::HTMLDocument::addItemToMap
+   fun:WebCore::HTMLDocument::addNamedItem
+   fun:WebCore::HTMLFormElement::insertedIntoDocument
+   fun:WebCore::ContainerNode::addChild
+   fun:WebCore::LegacyHTMLTreeConstructor::insertNode
+   fun:WebCore::LegacyHTMLTreeConstructor::handleError
+   fun:WebCore::LegacyHTMLTreeConstructor::insertNode
+   fun:WebCore::LegacyHTMLTreeConstructor::handleError
+   fun:WebCore::LegacyHTMLTreeConstructor::insertNode
+   fun:WebCore::LegacyHTMLTreeConstructor::insertNodeAfterLimitDepth
+   fun:WebCore::LegacyHTMLTreeConstructor::parseToken
+   fun:WebCore::HTML5TreeBuilder::passTokenToLegacyParser
+   fun:WebCore::HTML5TreeBuilder::constructTreeFromToken
+   fun:WebCore::HTML5DocumentParser::pumpLexer
+   fun:WebCore::HTML5DocumentParser::pumpLexerIfPossible
+   fun:WebCore::HTML5DocumentParser::write
+   fun:WebCore::DocumentWriter::addData
+   fun:WebCore::FrameLoader::addData
+   fun:WebKit::WebFrameImpl::commitDocumentData
+   fun:WebKit::FrameLoaderClientImpl::committedLoad
+   fun:WebCore::FrameLoader::committedLoad
+   fun:WebCore::DocumentLoader::commitLoad
+   fun:WebCore::DocumentLoader::receivedData
+   fun:WebCore::FrameLoader::receivedData
+   fun:WebCore::MainResourceLoader::addData
+}