Suppress memory leak in PluginFinder::GetPluginMetadata

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 76e20e43968510b08de1b1e965ab492f817e52c8..231aacd886a0ba6ec75fd1a651151d6421acd069 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -5929,13 +5929,22 @@
    fun:_ZN4base18MessagePumpAuraX1118GetDefaultXDisplayEv
 }
 {
-   bug_147755
+   bug_147755_a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN12PluginFinder18GetPluginInstallerERKN6webkit13WebPluginInfoE
    fun:_ZN11PluginPrefs30EnablePluginIfPossibleCallbackEbRK8FilePathRKN4base8CallbackIFvbEEEP12PluginFinder
 }
 {
+   bug_147755_b
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN12PluginFinder17GetPluginMetadataERKN6webkit13WebPluginInfoE
+   fun:_ZN11PluginPrefs12EnablePluginEbRK8FilePathRKN4base8CallbackIFvbEEE
+   fun:_ZN15PluginPrefsTest25EnablePluginSynchronouslyEbRK8FilePathb
+   fun:_ZN44PluginPrefsTest_UnifiedPepperFlashState_Test8TestBodyEv
+}
+{
    bug_148637_a
    Memcheck:Unaddressable
    ...