Heapchecker: Update suppression after net namespace CL....

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 # running overnight and removing outdated bugs/suppressions.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 1165 matching lines @@
 }
 # URLRequest*Job stands for {URLRequestJob,URLRequestChromeJob,URLRequestHttpJob}
 {
    bug_68290
    Heapcheck:Leak
    fun:ResourceDispatcherHost::NotifyResponseStarted
    fun:ResourceDispatcherHost::CompleteResponseStarted
    fun:ResourceDispatcherHost::OnResponseStarted
    fun:net::URLRequest::ResponseStarted
    fun:net::URLRequest*Job::NotifyHeadersComplete
-   fun:URLRequestTestJob::StartAsync
+   fun:net::URLRequestTestJob::StartAsync
    fun:void DispatchToMethod
    fun:RunnableMethod::Run
    fun:MessageLoop::RunTask
    fun:MessageLoop::DeferOrRunPendingTask
    fun:MessageLoop::DoWork
 }
 {
    bug_68304
    Heapcheck:Leak
    ...
    fun:IPC::ParamTraits::Read
    fun:IPC::ReadParam
    fun:IPC::MessageWithTuple::Read
    fun:IPC::MessageWithTuple::Dispatch
    fun:ResourceDispatcherHost::OnMessageReceived
    fun:ResourceDispatcherHostTest::MakeTestRequest
 }