Suppress an uninit Valgrind report on a few layout tests

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 2e82ac6f9e498c74ea64f4dcf8b634b1600472fe..9c79809434bd29076afa6b53ef059f13b0dde3f0 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -6258,3 +6258,28 @@
    fun:_Znw*
    fun:_ZN8app_list4test12_GLOBAL__N_122AppListViewTestContext16RunStartPageTestEv
 }
+{
+   bug_405865
+   Memcheck:Uninitialized
+   fun:_ZNK5blink13InlineFlowBox20computeMaxLogicalTopERf
+   ...
+   fun:_ZNK5blink13RootInlineBox13maxLogicalTopEv
+   fun:_ZN5blinkL22computeUnderlineOffsetENS_21TextUnderlinePositionERKNS_11FontMetricsEPKNS_13InlineTextBoxEf
+   fun:_ZN5blink13InlineTextBox15paintDecorationEPNS_15GraphicsContextERKNS_10FloatPointENS_14TextDecorationEPKNS_10ShadowListE
+   fun:_ZN5blink13InlineTextBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
+   fun:_ZN5blink13InlineFlowBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
+   fun:_ZN5blink13RootInlineBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
+   fun:_ZNK5blink17RenderLineBoxList5paintEPNS_20RenderBoxModelObjectERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock13paintContentsERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock11paintObjectERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock5paintERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock10paintChildEPNS_9RenderBoxERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock13paintChildrenERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock13paintContentsERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock11paintObjectERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock5paintERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock10paintChildEPNS_9RenderBoxERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock13paintChildrenERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock13paintContentsERNS_9PaintInfoERKNS_11LayoutPointE
+   fun:_ZN5blink11RenderBlock11paintObjectERNS_9PaintInfoERKNS_11LayoutPointE
+}