Valgrind: Suppress more layout test errors.

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 # running overnight and removing outdated bugs/suppressions.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 3317 matching lines @@
    fun:_ZN7content17ResourceScheduler15OnClientCreatedEiibb
    fun:_ZN7content26ResourceDispatcherHostImpl23OnRenderViewHostCreatedEiibb
 }
 {
    bug_492821
    Memcheck:Uninitialized
    fun:_ZN5blink17CSSPropertyParser9validUnitEPNS_14CSSParserValueENS0_5UnitsENS_13CSSParserModeENS0_31ReleaseParsedCalcValueConditionE
    fun:_ZN5blink17CSSPropertyParser9validUnitEPNS_14CSSParserValueENS0_5UnitsENS0_31ReleaseParsedCalcValueConditionE
    ...
    fun:_ZN5blink17CSSPropertyParser10parseValueENS_13CSSPropertyIDEb
-   fun:_ZN5blink17CSSPropertyParser10parseValueENS_13CSSPropertyIDEbPNS_18CSSParserValueListERKNS_16CSSParserContextERN3WTF6VectorINS_11CSSPropertyELm256ENS7_16DefaultAllocatorEEENS_13StyleRuleBase4TypeE
+   fun:_ZN5blink17CSSPropertyParser10parseValueENS_13CSSPropertyID*
    fun:_ZN5blink13CSSParserImpl23consumeDeclarationValueENS_19CSSParserTokenRangeENS_13CSSPropertyIDEbNS_13StyleRuleBase4TypeE
 }
 {
    bug_514434
    Memcheck:Leak
    fun:malloc
    fun:__netlink_request
    fun:getifaddrs_internal
    fun:getifaddrs
    fun:_ZN3net25HaveOnlyLoopbackAddressesEv
@@ skipping 43 matching lines @@
    bug_515266
    Memcheck:Uninitialized
    fun:_ZN3WTF16VectorBufferBaseIN5blink6MemberINS1_11MessagePortEEELb1ENS1_13HeapAllocatorEE6bufferEv
    fun:_ZN3WTF6VectorIN5blink6MemberINS1_11MessagePortEEELm1ENS1_13HeapAllocatorEE5traceINS1_27InlinedGlobalMarkingVisitorEEEvT_
    fun:_ZN5blink10TraceTraitIN3WTF6VectorINS_6MemberINS_11MessagePortEEELm1ENS_13HeapAllocatorEEEE5traceEPNS_7VisitorEPv
    fun:_ZN5blink13CallbackStack4Item4callEPNS_7VisitorE
    fun:_ZN5blink4Heap25popAndInvokeTraceCallbackEPNS_7VisitorE
    fun:_ZN5blink4Heap19processMarkingStackEPNS_7VisitorE
 }
 {
+   bug_521656
+   Memcheck:Uninitialized
+   fun:_ZN5blink10TraceTraitINS_11WebGLObjectEE5traceEPNS_7VisitorEPv
+   fun:_ZN5blink13CallbackStack4Item4callEPNS_7VisitorE
+   fun:_ZN5blink4Heap25popAndInvokeTraceCallbackEPNS_7VisitorE
+   fun:_ZN5blink4Heap19processMarkingStackEPNS_7VisitorE
+   fun:_ZN5blink4Heap14collectGarbageENS_11ThreadState10StackStateENS1_6GCTypeENS0_8GCReasonE
+   fun:_ZN5blink14V8GCController10gcEpilogueEN2v86GCTypeENS1_15GCCallbackFlagsE
+   fun:_ZN2v88internal4Heap23CallGCEpilogueCallbacksENS_6GCTypeENS_15GCCallbackFlagsE
+   fun:_ZN2v88internal4Heap24PerformGarbageCollectionENS0_16GarbageCollectorENS_15GCCallbackFlagsE
+}
+{
    bug_522049
    Memcheck:Unaddressable
    ...
    fun:_ZNKSt8_Rb_treeISsSt4pairIKSsN2ui13TextInputModeEESt10_Select1stIS4_ESt4lessISsESaIS4_EE4findERS1_
    fun:_ZNKSt3mapISsN2ui13TextInputModeESt4lessISsESaISt4pairIKSsS1_EEE4findERS5_
    fun:_ZN12_GLOBAL__N_116ConvertInputModeERKN5blink9WebStringE
    fun:_ZN7content12RenderWidget20UpdateTextInputStateENS0_7ShowImeENS0_12ChangeSourceE
    fun:_ZN7content12RenderWidget24WillBeginCompositorFrameEv
    fun:_ZN7content22RenderWidgetCompositor18WillBeginMainFrameEv
    fun:_ZThn8_N7content22RenderWidgetCompositor18WillBeginMainFrameEv
@@ skipping 127 matching lines @@
    Memcheck:Overlap
    fun:memcpy@@GLIBC_2.14
    fun:BrotliDecompressStreaming
    fun:BrotliDecompress
    fun:BrotliDecompressBuffer
    fun:_ZN3ots18ConvertWOFF2ToSFNTEPNS_4FontEPhmPKhm
    fun:_ZN12_GLOBAL__N_112ProcessWOFF2EPN3ots12OpenTypeFileEPNS0_4FontEPNS0_9OTSStreamEPKhm
    fun:_ZN3ots10OTSContext7ProcessEPNS_9OTSStreamEPKhmj
    fun:_ZN5blink17OpenTypeSanitizer8sanitizeEv
 }
+{
+   bug_542875
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF10fastMallocEm
+   ...
+   fun:_ZN5blink13DOMTypedArrayIN3WTF17Uint8ClampedArrayEN2v817Uint8ClampedArrayEE12createOrNullEj
+   fun:_ZN5blink9ImageData6createERKNS_7IntSizeE
+   fun:_ZNK5blink17HTMLCanvasElement11toImageDataENS_19SourceDrawingBufferE
+}