Split a portion of BufferedResourceLoader into a separate class ActiveLoader.

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
diff --git a/tools/heapcheck/suppressions.txt b/tools/heapcheck/suppressions.txt
index febe5e7abc97f707c71fb64bb98514ddd9eefbc6..dd1ad2e6fd0628b72d2e2c268f1ca0158d97b50e 100644
--- a/tools/heapcheck/suppressions.txt
+++ b/tools/heapcheck/suppressions.txt
@@ -1771,27 +1771,3 @@
    fun:browser_sync::DataTypeManagerImpl::Stop
    fun:ProfileSyncService::Shutdown
 }
-{
-   bug_100914_a
-   Heapcheck:Leak
-   ...
-   fun:webkit_media::MockBufferedDataSource::CreateMockResourceLoader
-}
-{
-   bug_100914_b
-   Heapcheck:Leak
-   ...
-   fun:BufferedDataSourceTest
-}
-{
-   bug_100914_c
-   Heapcheck:Leak
-   ...
-   fun:webkit_media::BufferedDataSourceTest::Initialize
-}
-{
-   bug_100914_d
-   Heapcheck:Leak
-   fun:webkit_media::MockBufferedDataSource::MockBufferedDataSource
-   fun:webkit_media::BufferedDataSourceTest::BufferedDataSourceTest
-}