Revert valgrind suppression added in r65660.

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 # running overnight and removing outdated bugs/suppressions.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 3268 matching lines @@
 }
 {
    bug_61753/Param
    Memcheck:Param
    ...
    fun:pkix_*
    ...
    fun:CERT_PKIXVerifyCert
 }
 {
-   bug_62674
-   Memcheck:Addr4
-   fun:_ZN3net25SingleRequestHostResolver6CancelEv
-   fun:_ZN3net25SingleRequestHostResolverD1Ev
-   fun:_ZN3net13TCPConnectJobD0Ev
-   fun:_Z26STLDeleteContainerPointersISt23_Rb_tree_const_iteratorIPN3net10ConnectJobEEEvT_S5_
-   fun:_Z17STLDeleteElementsISt3setIPN3net10ConnectJobESt4lessIS3_ESaIS3_EEEvPT_
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelper5Group13RemoveAllJobsEv
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelper20CancelAllConnectJobsEv
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelper5FlushEv
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelperD1Ev
-   fun:_ZN3net20ClientSocketPoolBaseINS_15TCPSocketParamsEED1Ev
-   fun:_ZN3net19TCPClientSocketPoolD0Ev
-   fun:_ZN10scoped_ptrIN3net19TCPClientSocketPoolEED1Ev
-}
-{
    bug_63015
    Memcheck:Addr2
    fun:_ZN7WebCore18stringToLengthTypeERPKtS1_
    fun:_ZN7WebCore9SVGLength16setValueAsStringERKN3WTF6StringERi
    fun:_ZN7WebCore13SVGLengthList5parseERKN3WTF6StringENS_13SVGLengthModeE
    fun:_ZN7WebCore25SVGTextPositioningElement20parseMappedAttributeEPNS_9AttributeE
    fun:_ZN7WebCore14SVGTextElement20parseMappedAttributeEPNS_9AttributeE
    fun:_ZN7WebCore13StyledElement16attributeChangedEPNS_9AttributeEb
    fun:_ZN7WebCore10SVGElement16attributeChangedEPNS_9AttributeEb
    fun:_ZN7WebCore7Element12setAttributeERKNS_13QualifiedNameERKN3WTF12AtomicStringERi
@@ skipping 138 matching lines @@
    fun:_ZN8remoting38ScreenRecorderTest_OneRecordCycle_Test8TestBodyEv
 }
 {
    bug_65932
    Memcheck:Value4
    ...
    fun:_ZN7WebCore13InlineFlowBox26placeBoxesInBlockDirectionEiiibRiS1_RbS1_S1_S2_NS_12FontBaselineE
    fun:_ZN7WebCore13RootInlineBox26alignBoxesInBlockDirectionEiRN3WTF7HashMapIPKNS_13InlineTextBoxESt4pairINS1_6VectorIPKNS_14SimpleFontDataELj0EEENS_13GlyphOverflowEENS1_7PtrHashIS5_EENS1_10HashTraitsIS5_EENSG_ISD_EEEERNS_21VerticalPositionCacheE
    fun:_ZN7WebCore11RenderBlock37computeBlockDirectionPositionsForLineEPNS_13RootInlineBoxEPNS_7BidiRunERN3WTF7HashMapIPKNS_13InlineTextBoxESt4pairINS5_6VectorIPKNS_14SimpleFontDataELj0EEENS_13GlyphOverflowEENS5_7PtrHashIS9_EENS5_10HashTraitsIS9_EENSK_ISH_EEEERNS_21VerticalPositionCacheE
 }