Valgrind: Remove a bunch of unused suppressions.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 289440)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -558,23 +558,6 @@
    fun:_ZN7content11ChildThread4InitEv
 }
 {
-   bug_16326
-   Memcheck:Leak
-   fun:_Znw*
-   ...
-   fun:_ZN11webkit_glue16WebURLLoaderImplC1Ev
-   fun:_ZN11webkit_glue16WebKitClientImpl15createURLLoaderEv
-   fun:_ZN5blink22ResourceHandleInternal5startEv
-}
-{
-   bug_17291
-   Memcheck:Leak
-   fun:malloc
-   fun:_ZN3WTF10fastMallocE*
-   ...
-   fun:_ZN2v88internal8JSObject23SetPropertyWithCallbackEPNS0_6ObjectEPNS0_6StringES3_PS1_
-}
-{
    # also bug 17979.  It's a nest of leaks.
    bug_17385
    Memcheck:Leak
@@ -597,16 +580,6 @@
    fun:_ZN3IPC12ChannelProxy7Context15OnChannelOpenedEv
 }
 {
-   bug_19196
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN2v817RegisterExtensionEPNS_9ExtensionE
-   fun:_ZN5blink7V8Proxy23registerExtensionWithV8EPN2v89ExtensionE
-   fun:_ZN5blink7V8Proxy17registerExtensionEPN2v89ExtensionEi
-   fun:_ZN5blink17registerExtensionEPN2v89ExtensionEi
-   fun:_ZN12RenderThread23EnsureWebKitInitializedEv
-}
-{
    bug_19371
    Memcheck:Leak
    fun:_Znw*
@@ -627,24 +600,6 @@
    fun:_ZN4base18MessagePumpDefault3RunEPNS_11MessagePump8DelegateE
 }
 {
-   bug_19377
-   Memcheck:Leak
-   fun:calloc
-   ...
-   fun:event_base_new
-   fun:_ZN4base19MessagePumpLibeventC1Ev
-   fun:_ZN4base11MessageLoopC1ENS0_4TypeE
-   fun:_ZN4base6Thread10ThreadMainEv
-}
-{
-   bug_19463
-   Memcheck:Leak
-   ...
-   fun:_ZN4base19MessagePumpLibevent4InitEv
-   fun:_ZN4base19MessagePumpLibeventC1Ev
-   fun:_ZN4base11MessageLoopC1ENS0_4TypeE
-}
-{
    bug_19775_a
    Memcheck:Leak
    ...
@@ -713,18 +668,6 @@
    fun:event_base_loop
 }
 {
-   bug_22098
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN4base19MessagePumpLibevent19WatchFileDescriptorEibNS0_4ModeEPNS0_21FileDescriptorWatcherEPNS0_7WatcherE
-   fun:_ZN4base16MessageLoopForIO19WatchFileDescriptorEibNS_4ModeEPN4base19MessagePumpLibevent21FileDescriptorWatcherEPNS2_7WatcherE
-   fun:_ZN3IPC7Channel11ChannelImpl23ProcessOutgoingMessagesEv
-   fun:_ZN3IPC7Channel11ChannelImpl4SendEPNS_7MessageE
-   fun:_ZN3IPC7Channel4SendEPNS_7MessageE
-   fun:_ZN3IPC12ChannelProxy7Context13OnSendMessageEPNS_7MessageE
-   fun:_ZN3IPC8SendTask3RunEv
-}
-{
    bug_22923
    Memcheck:Leak
    fun:_Znw*
@@ -2248,19 +2191,6 @@
    fun:_ZN11PluginPrefs19OnUpdatePreferencesESt6vectorIN6webkit13WebPluginInfoESaIS2_EES0_INS1_5npapi11PluginGroupESaIS6_EE
 }
 {
-   bug_95902
-   Memcheck:Leak
-   ...
-   fun:xdg_mime_init
-   fun:xdg_mime_get_mime_type_from_file_name
-   fun:*GetFileMimeTypeE*
-   fun:_ZNK3net16PlatformMimeUtil32GetPlatformMimeTypeFromExtensionERKSsPSs
-   fun:_ZNK3net8MimeUtil30GetMimeTypeFromExtensionHelperERKSsbPSs
-   fun:_ZNK3net8MimeUtil24GetMimeTypeFromExtensionERKSsPSs
-   fun:_ZNK3net8MimeUtil19GetMimeTypeFromFileE*
-   fun:_ZN3net19GetMimeTypeFromFileE*
-}
-{
    bug_96069
    Memcheck:Leak
    fun:_Znw*