Valgrind: Suppress a new variation of a libpng error and widen the mac LoadLibrary suppression.

BUG=63671
TEST=none
TBR=jhawkins
Review URL: http://codereview.chromium.org/8681022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111462 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -2764,6 +2764,15 @@
    fun:_Z24ConvertWebAppToExtensionRK18WebApplicationInfoRKN4base4TimeE
    fun:_ZN30ExtensionFromWebApp_Basic_Test8TestBodyEv
 }
+{
+   bug_63671_b
+   Memcheck:Param
+   write(buf)
+   ...
+   fun:_ZN9file_util9WriteFileERK8FilePathPKci
+   fun:_ZN12_GLOBAL__N_110SaveBitmapEPSt6vectorIhSaIhEE8FilePathPb
+   fun:_ZN4base8internal15RunnableAdapterIPFvPSt6vectorIhSaIhEE8FilePathPbEE3RunERKS5_RKS6_RKS7_
+}
 {
    bug_64804
    Memcheck:Leak

tools/valgrind/memcheck/suppressions_mac.txt

@@ -330,7 +330,6 @@
    fun:_ZN6webkit5npapi9PluginLib13NP_InitializeEv
    fun:_ZN6webkit5npapi21WebPluginDelegateImpl6CreateERK8FilePathRKSsy
    fun:_ZN19TestWebViewDelegate20CreatePluginDelegateERK8FilePathRKSs
-   fun:_ZN6webkit5npapi13WebPluginImpl10initializeEPN6WebKit18WebPluginContainerE
 }
 {
    # Mac Sandbox test cases are registered in a global map.  This code is only