initialize un-inited values

tools/valgrind/memcheck/suppressions.txt

 # There are four 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 # running overnight and removing outdated bugs/suppressions.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 2754 matching lines @@
    fun:_ZN20LayoutTestController13waitUntilDoneERKN3WTF6VectorI10CppVariantLj0EEEPS2_
    fun:_ZN13CppBoundClass14MemberCallbackI20LayoutTestControllerE3runERKN3WTF6VectorI10CppVariantLj0EEEPS5_
    fun:_ZN13CppBoundClass6invokeEPvPK10_NPVariantjPS1_
    fun:_ZN11CppNPObject6invokeEP8NPObjectPvPK10_NPVariantjPS3_
    fun:_ZN7WebCore18npObjectInvokeImplERKN2v89ArgumentsENS_18InvokeFunctionTypeE
    fun:_ZN7WebCore21npObjectMethodHandlerERKN2v89ArgumentsE
    fun:_ZN2v88internal19HandleApiCallHelperILb0EEEPNS0_11MaybeObjectENS0_47_GLOBAL__N_v8_src_builtins.cc_*BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEE
    obj:*
 }
 {
-   bug_74383a
-   Memcheck:Uninitialized
-   fun:gtk_widget_set_size_request
-   fun:_ZN15StatusBubbleGtk22UpdateLabelSizeRequestEv
-   fun:_ZN15StatusBubbleGtk19AnimationProgressedEPKN2ui9AnimationE
-   fun:_ZN2ui15LinearAnimation4StepEN4base9TimeTicksE
-   fun:_ZN2ui18AnimationContainer3RunEv
-}
-{
-   bug_74383b
-   Memcheck:Uninitialized
-   fun:gtk_widget_set_usize_internal
-   fun:_ZN15StatusBubbleGtk22UpdateLabelSizeRequestEv
-   ...
-   fun:_ZN2ui18AnimationContainer3RunEv
-}
-{
    bug_75019
    Memcheck:Leak
    fun:_Znw*
    ...
    fun:_ZN14GpuDataManagerC1Ev
    fun:_ZN22DefaultSingletonTraitsI14GpuDataManagerE3NewEv
    fun:_ZN9SingletonI14GpuDataManager22DefaultSingletonTraitsIS0_ES0_E3getEv
    fun:_ZN14GpuDataManager11GetInstanceEv
    fun:_Z11BrowserMainRK18MainFunctionParams
    fun:_ZN20InProcessBrowserTest5SetUpEv
@@ skipping 3224 matching lines @@
    bug_146464
    Memcheck:Leak
    fun:realloc
    fun:add_codeset.isra.10
    ...
    fun:XCreatePixmap
    fun:XCreateBitmapFromData
    ...
    fun:_ZN4aura19RootWindowHostLinuxC1EPNS_22RootWindowHostDelegateERKN3gfx4RectE
 }