Refactor suppression rules for Bug 90013.

tools/heapcheck/suppressions.txt

 # There are three kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 1208 matching lines @@
 }
 {
    bug_91174
    Heapcheck:Leak
    fun:DownloadManager::OnPathExistenceAvailable
 }
 {
    bug_90013_a
    Heapcheck:Leak
    fun:??
-   ...
-   fun:pango_fc_font*
-   ...
-   fun:gfx::RenderTextLinux::*
+   fun:gfx::RenderTextLinux::EnsureLayout
 }
 {
    bug_90013_b
    Heapcheck:Leak
-   ...
    fun:??
-   fun:??
-   fun:??
-   ...
-   fun:pango_fc_font_*
+   fun:gfx::RenderTextLinux::GetStringSize
 }
 {
    bug_90013_c
    Heapcheck:Leak
    fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   fun:??
+   fun:::FindBestMatchFontFamilyName
+   fun:PlatformFontPango
 }
 {
    bug_90013_d
    Heapcheck:Leak
    fun:??
-   fun:??
-   fun:??
-   fun:??
-   ...
-   fun:XML_ParseBuffer
-   fun:??
-   fun:??
-   fun:??
-   fun:??
-   ...
-   fun:PlatformFontPango
+   fun:gfx::GetPangoFontMetrics
+   fun:gfx::PlatformFontPango::InitPangoMetrics
 }
 {
    bug_91491
    Heapcheck:Leak
    ...
    fun:CrxUpdateService::ProcessPendingItems
 }
 {
    bug_91845_a
    Heapcheck:Leak
@@ skipping 527 matching lines @@
    fun:FileSystem*URLRequestJobTest_InvalidURL_Test
    fun:testing::internal::TestFactoryImpl::CreateTest
 }
 {
    bug_124758
    Heapcheck:Leak
    fun:sqlite3MemMalloc
    fun:crypto::RSAPrivateKey::FindFromPublicKeyInfo
    fun:crypto::RSAPrivateKeyNSSTest_*_Test::TestBody
 }