Fix webkit_media::WebMediaPlayerProxy memory leak due to circular refcounting.

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 # running overnight and removing outdated bugs/suppressions.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 3752 matching lines @@
 }
 {
    bug_87222
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN10URLFetcher6CreateEiRK4GURLNS_11RequestTypeEPNS_8DelegateE
    fun:_ZN16TranslateManager36FetchLanguageListFromTranslateServerEP11PrefService
    fun:_Z11BrowserMainRK18MainFunctionParams
    fun:*RunNamedProcessTypeMainERKSsRK18MainFunctionParams
 }
 {

[scherkus (not reviewing), 2011/11/18 03:10:13]

ignore -- this was committed as http://crrev.com/110627

-   bug_87245
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_Z17NewRunnableMethodIN11webkit_glue18WebMediaPlayerImpl5ProxyEMS2_FvvEEP14CancelableTaskPT_T0_
-   fun:_ZN11webkit_glue18WebMediaPlayerImpl5Proxy7RepaintEv
-   fun:_ZN11webkit_glue17VideoRendererImpl16OnFrameAvailableEv
-   fun:_ZN5media17VideoRendererBase10ThreadMainEv
-}
-{
    bug_87408
    Memcheck:Addr4
    fun:sqlite3MemSize
    fun:sqlite3MallocSize
    fun:sqlite3_free
    fun:sqlite3_close
    fun:_ZN3sql10Connection5CloseEv
    fun:_ZN3sql10ConnectionD2Ev
    fun:_ZN3sql10ConnectionD1Ev
    fun:_ZN7history16ArchivedDatabaseD0Ev
@@ skipping 907 matching lines @@
    fun:_ZN7WebCore11RenderBlock11layoutBlockEbiNS0_15BlockLayoutPassE
    fun:_ZN7WebCore11RenderBlock6layoutEv
 }
 {
    bug_100330
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN25TestingAutomationProvider42NavigateToURLBlockUntilNavigationsCompleteEiRK4GURLiPN3IPC7MessageE
 }
 {
-   bug_100583
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN11webkit_media18WebMediaPlayerImpl10InitializeEPN6WebKit8WebFrameEb13scoped_refptrINS_16WebVideoRendererEE
-   ...
-   fun:_ZN6WebKitL20createWebMediaPlayerEPNS_20WebMediaPlayerClientEPN7WebCore5FrameE
-   fun:_ZN6WebKit24WebMediaPlayerClientImpl12loadInternalEv
-   fun:_ZN6WebKit24WebMediaPlayerClientImpl4loadERKN3WTF6StringE
-   fun:_ZN7WebCore11MediaPlayer23loadWithNextMediaEngineEPNS_18MediaPlayerFactoryE
-   fun:_ZN7WebCore11MediaPlayer4loadERKN3WTF6StringERKNS_11ContentTypeE
-   fun:_ZN7WebCore16HTMLMediaElement12loadResourceERKNS_4KURLERNS_11ContentTypeE
-   ...
-   fun:_ZN7WebCore16HTMLMediaElement19selectMediaResourceEv
-   fun:_ZN7WebCore16HTMLMediaElement12loadInternalEv
-   fun:_ZN7WebCore16HTMLMediaElement14loadTimerFiredEPNS_5TimerIS0_EE
-   fun:_ZN7WebCore5TimerINS_16HTMLMediaElementEE5firedEv
-}
-{
    bug_100608
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN27SQLitePersistentCookieStore7Backend21LoadCookiesForDomainsERKSt3setISsSt4lessISsESaISsEE
 }
 {
    bug_100647
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN18WebResourceService19UpdateResourceCacheERKSs
@@ skipping 515 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
 }