Don't leak ChromeDownloadManagerDelegate in DownloadService

tools/valgrind/memcheck/suppressions.txt

 # There are four 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 # running overnight and removing outdated bugs/suppressions.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 4044 matching lines @@
    fun:_ZN7history17ExpireHistoryTest14AddExampleDataEP?PN4base4TimeE
    fun:_ZN7history*ExpireHistoryTest_*
 }
 {
    bug_101781_d
    Memcheck:Uninitialized
    fun:_ZN7testing8internal11CmpHelperGEIddEENS_15AssertionResultEPKcS4_RKT_RKT0_
    fun:_ZN3gfx31JPEGCodec_EncodeDecodeRGBA_Test8TestBodyEv
 }
 {
-   bug_102255
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN15DownloadService18GetDownloadManagerEv
-   fun:_ZN29ExtensionDownloadsEventRouterC*
-   fun:_ZN16ExtensionService16InitEventRoutersEv
-   fun:_ZN16ExtensionService7ObserveEiRKN7content18NotificationSourceERKNS0_19NotificationDetailsE
-   ...
-   fun:_ZN23NotificationServiceImpl6NotifyEiRKN7content18NotificationSourceERKNS0_19NotificationDetailsE
-   fun:_ZN14ProfileManager16OnImportFinishedEP7Profile
-   fun:_ZN22ChromeBrowserMainParts25PreMainMessageLoopRunImplEv
-}
-{
-   bug_102255b
-   Memcheck:Leak
-   fun:_Znw*
-   ...
-   fun:_ZN15DownloadService18GetDownloadManagerEv
-   fun:_ZN11DownloadsUIC1EPN7content5WebUIE
-   fun:_ZN12_GLOBAL__N_18NewWebUII11DownloadsUIEEPN7content15WebUIControllerEPNS2_5WebUIERK4GURL
-   fun:_ZNK28ChromeWebUIControllerFactory27CreateWebUIControllerForURLEPN7content5WebUIERK4GURL
-   fun:_ZNK32TestChromeWebUIControllerFactory27CreateWebUIControllerForURLEPN7content5WebUIERK4GURL
-   fun:_ZN15WebContentsImpl11CreateWebUIERK4GURL
-   fun:_ZN15WebContentsImpl27CreateWebUIForRenderManagerERK4GURL
-   fun:_ZN21RenderViewHostManager30UpdateRendererStateForNavigateERKN7content19NavigationEntryImplE
-   fun:_ZN21RenderViewHostManager8NavigateERKN7content19NavigationEntryImplE
-   ...
-   fun:_ZN24NavigationControllerImpl9LoadEntryEPN7content19NavigationEntryImplE
-   fun:_ZN24NavigationControllerImpl7LoadURLERK4GURLRKN7content8ReferrerENS3_14PageTransitionERKSs
-   fun:_ZN12_GLOBAL__N_117LoadURLInContentsEPN7content11WebContentsERK4GURLPN7browser14NavigateParamsERKSs
-   fun:_ZN7browser8NavigateEPNS_14NavigateParamsE
-   fun:_ZN7Browser30ShowSingletonTabOverwritingNTPERKN7browser14NavigateParamsE
-   fun:_ZN7Browser16ShowDownloadsTabEv
-}
-{
    bug_102257
    Memcheck:Uninitialized
    ...
    fun:_ZN2v88internalL6InvokeEbNS0_6HandleINS0_10JSFunctionEEENS1_INS0_6ObjectEEEiPS5_Pb
    fun:_ZN2v88internal9Execution4CallENS0_6HandleINS0_6ObjectEEES4_iPS4_Pbb
 }
 {
    bug_102327a
    Memcheck:Leak
    fun:_Znw*
@@ skipping 873 matching lines @@
    fun:_ZN8notifier5Login15StartConnectionEv
    fun:_ZN13sync_notifier20InvalidationNotifier17UpdateCredentialsERKSsS2_
 }
 {
    bug_118890_b
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN13sync_notifier12_GLOBAL__N_124InvalidationNotifierTest5SetUpEv
 }
 {
-   bug_chromium_os_28149
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN15DownloadService18GetDownloadManagerEv
-   fun:_ZN5gdata18GDataSystemService10InitializeEv
-   fun:_ZNK5gdata25GDataSystemServiceFactory23BuildServiceInstanceForEP7Profile
-   fun:_ZN26ProfileKeyedServiceFactory20GetServiceForProfileEP7Profileb
-   fun:_ZN5gdata25GDataSystemServiceFactory13GetForProfileEP7Profile
-   fun:_ZN22FileBrowserEventRouter23ObserveFileSystemEventsEv
-   fun:_ZN16ExtensionService16InitEventRoutersEv
-}
-{
    bug_120146
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
    fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
    fun:_ZN5media21AudioOutputController5CloseERKN4base8CallbackIFvvEEE
    fun:_ZN17AudioRendererHost20CloseAndDeleteStreamEPNS_10AudioEntryE
    fun:_ZN17AudioRendererHost13DeleteEntriesEv
    fun:_ZN17AudioRendererHost16OnChannelClosingEv
    fun:_ZN3IPC12ChannelProxy7Context15OnChannelClosedEv
@@ skipping 550 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }