Split a portion of BufferedResourceLoader into a separate class ActiveLoader.

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 5293f10184d21cfc0fe8ef5dd2ca0bb84bd53dec..2b45916d1efc72e44927581e061831229cb7df0e 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -4694,30 +4694,6 @@
    fun:_ZN16CrxUpdateService19ProcessPendingItemsEv
 }
 {
-   bug_100914a

[Ami GONE FROM CHROMIUM, 2011/11/29 18:55:49]

Rebase?   
(but also, Yay!)

[scherkus (not reviewing), 2011/11/29 21:43:51]

Done.

-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN12webkit_media18BufferedDataSource20CreateResourceLoaderEll
-   ...
-   fun:_ZN12webkit_media18BufferedDataSource24HttpInitialStartCallbackEi
-}
-{
-   bug_100914b
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN12webkit_media18BufferedDataSource20CreateResourceLoaderEll
-   ...
-   fun:_ZN12webkit_media18BufferedDataSource14InitializeTaskEv
-}
-{
-   bug_100914c
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN12webkit_media18BufferedDataSource20CreateResourceLoaderEll
-   ...
-   fun:_ZN12webkit_media18BufferedDataSource18RestartLoadingTaskEv
-}
-{
    bug_100916
    Memcheck:Leak
    fun:_Znw*