Add/widen suppressions for Mac UI valgrind bots

tools/valgrind/memcheck/suppressions_mac.txt

 # There are three kinds of suppressions in this file:
 # 1. Third party stuff we have no control over.
 #
 # 2. Intentional unit test errors, 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.
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 96 matching lines @@
    fun:-[NSApplication run]
 }
 {
    bug_18223
    Memcheck:Cond
    fun:_ZNK8Security12UnixPlusPlus17StaticForkMonitorclEv
    fun:_ZN12ocspdGlobals10serverPortEv
 }
 {
    # Invalid read
+   bug_20508a
+   Memcheck:Addr4
+   ...
+   fun:ripc_DrawGlyphs
+   fun:draw_glyphs
+   fun:CGContextShowGlyphsWithAdvances
+}
+{
+   # Invalid read
    bug_20508b
    Memcheck:Addr4
    fun:_eATSFontGetGlyphIDsForGlyphNames
    fun:ATSFontGetGlyphIDsForGlyphNames
    fun:ats_font_get_glyphs_for_glyph_names
    fun:get_glyphs_for_glyph_names
 }
 {
    # Nasty invalid write. Reported to Apple as rdar://7240303.
    bug_18189
@@ skipping 81 matching lines @@
    fun:_ZN3IPC7Channel11ChannelImpl23ProcessOutgoingMessagesEv
 }
 {
    bug_20814
    Memcheck:Addr4
    fun:_ZN10CLVContextC2EPKvm
    fun:_Z26getAllCarbonLazyValues2000v
    fun:CLVVisitValuesForKey
    fun:INIT_ResourceManager
    fun:CurResFile
-   fun:_ZN5NPAPI12_GLOBAL__N_124ScopedBundleResourceFileC1EP10__CFBundle
    ...
    fun:_ZN5NPAPI12_GLOBAL__N_117ReadSTRPluginInfoERK8FilePathP10__CFBundleP13WebPluginInfo
    fun:_ZN5NPAPI9PluginLib17ReadWebPluginInfoERK8FilePathP13WebPluginInfo
 }
 {
    bug_20997
    Memcheck:Param
    socketcall.sendmsg(msg.msg_iov[i])
    fun:sendmsg$UNIX2003
    fun:_ZN3IPC7Channel11ChannelImpl4SendEPNS_7MessageE
@@ skipping 69 matching lines @@
 }
 {
    bug_23416
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN11webkit_glue16WebURLLoaderImplC2Ev
    ...
    fun:_ZN11webkit_glue20ImageResourceFetcherC1ERK4GURLPN6WebKit8WebFrameEiiP14CallbackRunnerI6Tuple2IPS0_RK8SkBitmapEE
    fun:_ZN10RenderView13DownloadImageEiRK4GURLi
 }
-
+{
+   bug_25648
+   Memcheck:Leak
+   fun:malloc
+   fun:sqlite3MemMalloc
+   ...
+   fun:yy_reduce
+   fun:sqlite3Parser
+   ...
+   fun:_ZN7history15HistoryDatabase4InitERK8FilePathS3_
+}
+{
+   bug_25656
+   Memcheck:Addr4
+   fun:bestBtreeIndex
+   fun:sqlite3WhereBegin
+   fun:sqlite3Select
+   fun:yy_reduce
+   fun:sqlite3Parser
+   ...
+   fun:_ZN7history14HistoryBackend*
+}
+{
+   bug_25661
+   Memcheck:Addr4
+   fun:_ZNK10scoped_ptrI11ChildThreadE3getEv
+   fun:_ZN12ChildProcess11main_threadEv
+   fun:_ZN11ChildThread7currentEv
+   fun:_ZN25WebMessagePortChannelImpl11postMessageERKN6WebKit9WebStringEPNS0_9WebVectorIPNS0_21WebMessagePortChannelEEE
+   fun:_ZN7WebCore26PlatformMessagePortChannel19postMessageToRemoteEN3WTF10PassOwnPtrINS_18MessagePortChannel9EventDataEEE
+   fun:_ZN7WebCore18MessagePortChannel19postMessageToRemoteEN3WTF10PassOwnPtrINS0_9EventDataEEE
+   fun:_ZN7WebCore11MessagePort11postMessageEN3WTF10PassRefPtrINS_21SerializedScriptValueEEEPKNS1_6VectorINS1_6RefPtrIS0_EELm1EEERi
+   fun:_ZN7WebCore8V8Custom32v8MessagePortPostMessageCallbackERKN2v89ArgumentsE
+   fun:_ZN2v88internalL21Builtin_HandleApiCallENS0_9ArgumentsE
+}