Suppress more memory leaks in ResourceDispatcherHostTest tests

tools/valgrind/memcheck/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 # running overnight and removing outdated bugs/suppressions.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 5297 matching lines @@
    fun:_ZN*DownloadManagerTest_*
 }
 {
    bug_93006b
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN15DownloadManager4InitEP7Profile
    fun:_ZN19DownloadManagerTestC2Ev
    fun:_ZN*DownloadManagerTest_*
 }
+{
+   bug_93006c
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN23DownloadResourceHandler10OnWillReadEiPPN3net8IOBufferEPii
+   fun:_ZN23BufferedResourceHandler27UseAlternateResourceHandlerEiP15ResourceHandler
+   fun:_ZN23BufferedResourceHandler23CompleteResponseStartedEib
+   fun:_ZN23BufferedResourceHandler15OnReadCompletedEiPi
+   fun:_ZN22ResourceDispatcherHost12CompleteReadEPN3net10URLRequestEPi
+   fun:_ZN22ResourceDispatcherHost15OnReadCompletedEPN3net10URLRequestEi
+   fun:_ZN3net10URLRequest19NotifyReadCompletedEi
+   fun:_ZN3net13URLRequestJob18NotifyReadCompleteEi
+   fun:_ZN3net17URLRequestTestJob20ProcessNextOperationEv
+   fun:_ZN3net17URLRequestTestJob24ProcessOnePendingMessageEv
+   fun:_ZN56ResourceDispatcherHostTest_*8TestBodyEv
+}
 
 #-----------------------------------------------------------------------
 # These only occur on our Google workstations
 {
    bug_todo_freeres
    Memcheck:Free
    fun:free
    fun:__libc_freeres
    fun:_vgnU_freeres
    fun:_Exit
@@ skipping 10 matching lines @@
 }
 {
    bug_todo_getdelim2
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }