Valgrind: Suppress a couple more errors and disable a flaky test.

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 # running overnight and removing outdated bugs/suppressions.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 5734 matching lines @@
    fun:_ZN6syncer12_GLOBAL__N_155JsSyncManagerObserverTest_OnInitializationComplete_Test8TestBodyEv
 }
 {
    bug_139635a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN6syncer21JsSyncManagerObserver24OnInitializationCompleteERKNS_10WeakHandleINS_9JsBackendEEEbNS_7EnumSetINS_9ModelTypeELS7_2ELS7_16EEE
    fun:_ZN6syncer15SyncManagerImpl4Init*
    fun:_ZN12browser_sync15SyncBackendHost4Core12DoInitializeERKNS0_19DoInitializeOptionsE
 }
+{
+   bug_139662
+   Memcheck:Uninitialized
+   fun:qcms_transform_data_rgba_out_lut_sse2
+   fun:qcms_transform_data_type
+   fun:_ZN7WebCore16JPEGImageDecoder15outputScanlinesEv
+   fun:_ZN7WebCore15JPEGImageReader6decodeERKNS_12SharedBufferEb
+}
+{
+   bug_139664
+   Memcheck:Uninitialized
+   fun:_ZN4skia12_GLOBAL__N_18ClampTo8Ei
+   fun:_ZN4skia12_GLOBAL__N_120ConvolveHorizontallyILb1EEEvPKhRKNS_19ConvolutionFilter1DEPh
+   fun:_ZN4skia14BGRAConvolve2DEPKhibRKNS_19ConvolutionFilter1DES4_iPhb
+   fun:_ZN4skia15ImageOperations11ResizeBasicERK8SkBitmapNS0_12ResizeMethodEiiRK7SkIRect
+   fun:_ZN4skia15ImageOperations6ResizeERK8SkBitmapNS0_12ResizeMethodEiiRK7SkIRect
+   fun:_ZNK7WebCore15NativeImageSkia13resizedBitmapERK7SkIRectiiS3_
+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 
 {
    bug_todo_getdelim
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    ...
    fun:call_init
    fun:_dl_init
 }
 {
    bug_todo_getdelim2
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }