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

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 924a306ab479312b1961990388c4005931224f70..852389bcc6fc281d3277ad6064c28a90be05325f 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -3771,15 +3771,6 @@
    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
@@ -4707,24 +4698,6 @@
    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*