Update from chromium https://crrev.com/301315

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 # running overnight and removing outdated bugs/suppressions.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 3351 matching lines @@
    ...
    fun:_ZNK5blink13RootInlineBox13maxLogicalTopEv
    fun:_ZN5blinkL22computeUnderlineOffsetENS_21TextUnderlinePositionERKNS_11FontMetricsEPKNS_13InlineTextBoxEf
    fun:_ZN5blink13InlineTextBox15paintDecorationEPNS_15GraphicsContextERKNS_10FloatPointENS_14TextDecorationE
    fun:_ZN5blink13InlineTextBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
    fun:_ZN5blink13InlineFlowBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
    fun:_ZN5blink13RootInlineBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
    fun:_ZNK5blink17RenderLineBoxList5paintEPNS_20RenderBoxModelObjectERNS_9PaintInfoERKNS_11LayoutPointE
 }
 {
-   bug_417093
-   Memcheck:Leak
-   fun:malloc
-   fun:_ZN3WTF10fastMallocEm
-   fun:_ZN3WTF24ThreadSafeRefCountedBasenwEm
-   fun:_ZN5blink7RawData6createEv
-   fun:_ZN5blink6Stream7addDataEPKcm
-   fun:_ZN5blink14XMLHttpRequest14didReceiveDataEPKci
-   fun:_ZThn80_N5blink14XMLHttpRequest14didReceiveDataEPKci
-   fun:_ZN5blink24DocumentThreadableLoader18handleReceivedDataEPKci
-   fun:_ZN5blink24DocumentThreadableLoader12dataReceivedEPNS_8ResourceEPKci
-   fun:_ZThn16_N5blink24DocumentThreadableLoader12dataReceivedEPNS_8ResourceEPKci
-}
-{
    bug_417119
    Memcheck:Leak
    fun:_Znw*
    ...
    fun:_ZN7storage27TaskRunnerBoundObserverListINS_18FileUpdateObserverEPS1_EaSERKS3_
    fun:_ZN7storage26FileSystemOperationContext20set_update_observersERKNS_27TaskRunnerBoundObserverListINS_18FileUpdateObserverEPS2_EE
    fun:_ZNK7storage32SandboxFileSystemBackendDelegate32CreateFileSystemOperationContextERKNS_13FileSystemURLEPNS_17FileSystemContextEPN4base4File5ErrorE
    fun:_ZNK7storage24SandboxFileSystemBackend25CreateFileSystemOperationERKNS_13FileSystemURLEPNS_17FileSystemContextEPN4base4File5ErrorE
    fun:_ZN7storage17FileSystemContext25CreateFileSystemOperationERKNS_13FileSystemURLEPN4base4File5ErrorE
 }
@@ skipping 46 matching lines @@
 {
    bug_424575
    Memcheck:Uninitialized
    fun:_ZN7content13NavigatorImpl23RecordNavigationMetricsERKNS_20LoadCommittedDetailsERK44FrameHostMsg_DidCommitProvisionalLoad_ParamsPNS_12SiteInstanceE
    fun:_ZN7content13NavigatorImpl11DidNavigateEPNS_19RenderFrameHostImplERK44FrameHostMsg_DidCommitProvisionalLoad_Params
    fun:_ZN7content19RenderFrameHostImpl26OnDidCommitProvisionalLoadERKN3IPC7MessageE
    fun:_ZN7content19TestRenderFrameHost26SendNavigateWithParametersEiRK4GURLN2ui14PageTransitionES3_iPKN4base8FilePathERKSt6vectorIS1_SaIS1_EE
    fun:_ZN7content19TestRenderFrameHost41SendNavigateWithTransitionAndResponseCodeEiRK4GURLN2ui14PageTransitionEi
    fun:_ZN7content19TestRenderFrameHost26SendNavigateWithTransitionEiRK4GURLN2ui14PageTransitionE
 }