Heapchecker: Remove a suppression since the leak has been fixed.

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
===================================================================
--- tools/heapcheck/suppressions.txt	(revision 112264)
+++ tools/heapcheck/suppressions.txt	(working copy)
@@ -1711,27 +1711,6 @@
    fun:chromeos::::GViewRequestInterceptorTest::SetUp
 }
 {
-   bug_104760
-   Heapcheck:Leak
-   fun:g_malloc
-   fun:g_slice_alloc
-   fun:g_datalist_id_set_data_full
-   fun:g_object_set_data
-   fun:views::NativeWidgetGtk::RegisterChildExposeHandler
-   fun:views::NativeViewHostGtk::NativeViewAttached
-   fun:views::NativeViewHost::Attach
-   fun:NativeTabContentsContainerGtk::AttachContents
-   fun:TabContentsContainer::ChangeTabContents
-   fun:ConstrainedHtmlDelegateGtk
-   fun:ConstrainedHtmlUI::CreateConstrainedHtmlDialog
-   fun:printing::PrintPreviewTabController::CreatePrintPreviewTab
-   fun:printing::PrintPreviewTabController::GetOrCreatePreviewTab
-#   fun:PrintPreviewHandlerTest_StickyMarginsCustomThenDefault_Test::TestBody
-#   fun:PrintPreviewTabControllerUnitTest_GetOrCreatePreviewTab_Test::TestBody
-#   fun:PrintPreviewTabControllerUnitTest_MultiplePreviewTabs_Test::TestBody
-#   fun:PrintPreviewTabControllerUnitTest_ClearInitiatorTabDetails_Test::TestBody
-}
-{
    bug_105624_a
    Heapcheck:Leak
    fun:PeerConnectionHandlerTest_Basic_Test::TestBody