Valgrind: Suppression for tabContentsViewFrameWillChange.

tools/valgrind/memcheck/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 # running overnight and removing outdated bugs/suppressions.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 3288 matching lines @@
    ...
    fun:_ZN54PrintPreviewTabControllerTest_MultiplePreviewTabs_Test8TestBodyEv
 }
 {
    bug_66386_b
    Memcheck:Leak
    fun:_Znw*
    ...
    fun:_ZN56PrintPreviewTabControllerTest_GetOrCreatePreviewTab_Test8TestBodyEv
 }
+{
+   bug_63428
+   Memcheck:Cond
+   fun:NSIntersectionRect
+   fun:-[BrowserWindowController tabContentsViewFrameWillChange:frameRect:]
+   fun:-[TabStripController tabContentsViewFrameWillChange:frameRect:]
+   fun:-[TabContentsController tabContentsViewFrameWillChange:]
+   fun:-[ResizeNotificationView setFrame:]
+   fun:-[TabStripController swapInTabAtIndex:]
+   fun:-[TabStripController selectTabWithContents:previousContents:atIndex:userGesture:]
+   fun:_ZN27TabStripModelObserverBridge13TabSelectedAtEP11TabContentsS1_ib
+   fun:_ZN13TabStripModel26ChangeSelectedContentsFromEP11TabContentsib
+   fun:_ZN13TabStripModel19InsertTabContentsAtEiP11TabContentsi
+   fun:_ZN13TabStripModel14AddTabContentsEP11TabContentsiji
+}