fix a memory leak and add a suppression

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
diff --git a/tools/heapcheck/suppressions.txt b/tools/heapcheck/suppressions.txt
index 75fae343027a632e6ef4815c7c8b576df8f9f850..977c7ca665909a2c3ff7fcf4cce7f1a5703e1c0e 100644
--- a/tools/heapcheck/suppressions.txt
+++ b/tools/heapcheck/suppressions.txt
@@ -1678,18 +1678,12 @@
    fun:net::KeygenHandler::GenKeyAndSignChallenge
 }
 {
-   bug_114979_a
+   bug_114979
    Heapcheck:Leak
    ...
    fun:BookmarkBarGtkUnittest::SetUp
 }
 {
-   bug_114979_b
-   Heapcheck:Leak
-   ...
-   fun:BookmarkBarGtkUnittest_HidesHelpMessageWithBookmark_Test::TestBody
-}
-{
    bug_114980
    Heapcheck:Leak
    ...
@@ -1876,3 +1870,15 @@
    fun:::OneClickSigninHelperTest::CreateMockWebContents
    fun:OneClickSigninHelperTest_*
 }
+{
+  bug_130640_a
+  Heapcheck:Leak
+  ...
+  fun:GtkThemeService::GetFolderIcon
+}
+{
+  bug_130640_b
+  Heapcheck:Leak
+  ...
+  fun:GtkThemeService::GetDefaultFavicon
+}