Add another suppression for bug 46658.

tools/heapcheck/suppressions.txt

 # There are three kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 638 matching lines @@
    bug_46649_i
    Heapcheck:Leak
    fun:__gnu_cxx::new_allocator::allocate
    fun:std::_Vector_base::_M_allocate
    fun:std::vector::_M_insert_aux
    fun:std::vector::push_back
    fun:courgette::EncodedProgram::AddOrigin
 }
 
 {
-   bug_46658
+   bug_46658_a
    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
@@ skipping 12 matching lines @@
    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
    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
+}