[Memory] Remove unused suppression

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 # running overnight and removing outdated bugs/suppressions.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 5858 matching lines @@
    fun:_ZN7WebCore12getImageDataILNS_8MultiplyE1EEEN3WTF10PassRefPtrINS2_17Uint8ClampedArrayEEERKNS_7IntRectEPNS_15GraphicsContextERKNS_7IntSizeE
    fun:_ZNK7WebCore11ImageBuffer24getUnmultipliedImageDataERKNS_7IntRectENS0_16CoordinateSystemE
    fun:_ZNK7WebCore24CanvasRenderingContext2D12getImageDataENS_11ImageBuffer16CoordinateSystemEffffRNS_14ExceptionStateE
    fun:_ZNK7WebCore24CanvasRenderingContext2D12getImageDataEffffRNS_14ExceptionStateE
    fun:_ZN7WebCore34CanvasRenderingContext2DV8InternalL18getImageDataMethodERKN2v820FunctionCallbackInfoINS1_5ValueEEE
    fun:_ZN7WebCore34CanvasRenderingContext2DV8InternalL26getImageDataMethodCallbackERKN2v820FunctionCallbackInfoINS1_5ValueEEE
    fun:_ZN2v88internal25FunctionCallbackArguments4CallEPFvRKNS_20FunctionCallbackInfoINS_5ValueEEEE
    fun:_ZN2v88internalL19HandleApiCallHelperILb0EEEPNS0_11MaybeObjectENS0_12_GLOBAL__N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE
 }
 {
-   bug_301900
-   Memcheck:Unaddressable
-   fun:_Z7GrCrashPKc
-   fun:_ZN19GrInOrderDrawBuffer6onDrawERKN12GrDrawTarget8DrawInfoE
-   fun:_ZN12GrDrawTarget20drawIndexedInstancesE15GrPrimitiveTypeiiiPK6SkRect
-   fun:_ZN19GrInOrderDrawBuffer10onDrawRectERK6SkRectPK8SkMatrixPS1_S5_
-   fun:_ZN12GrDrawTarget8drawRectERK6SkRectPK8SkMatrixPS1_S5_
-   ...
-   fun:_ZN13SkGPipeReader8playbackEPKvmjPm
-   fun:_ZN22DeferredPipeController8playbackEb
-   fun:_ZN14DeferredDevice20flushPendingCommandsE12PlaybackMode
-   fun:_ZN14DeferredDevice14onAccessBitmapEv
-   fun:_ZN12SkBaseDevice12accessBitmapEb
-   fun:_ZN12SkBaseDevice10readPixelsEP8SkBitmapiiN8SkCanvas10Config8888E
-   fun:_ZN8SkCanvas10readPixelsEP8SkBitmapiiNS_10Config8888E
-   fun:_ZN7WebCore15GraphicsContext10readPixelsEP8SkBitmapiiN8SkCanvas10Config8888E
-}
-{
    bug_309468
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN19TranslateBubbleView25CreateViewBeforeTranslateEv
    fun:_ZN19TranslateBubbleView4InitEv
    fun:_ZN5views18BubbleDelegateView12CreateBubbleEPS0_
    fun:_ZN23TranslateBubbleViewTest5SetUpEv
 }
 {
    bug_309477
@@ skipping 449 matching lines @@
    Memcheck:Leak
    fun:malloc
    fun:_ZN3WTF10fastMallocEm
    fun:_ZN3WTF10RefCountedIN7WebCore20IDBDatabaseCallbacksEEnwEm
    fun:_ZN7WebCore20IDBDatabaseCallbacks6createEv
    fun:_ZN7WebCore10IDBFactory12openInternalEPNS_16ExecutionContextERKN3WTF6StringElRNS_14ExceptionStateE
    fun:_ZN7WebCore10IDBFactory4openEPNS_16ExecutionContextERKN3WTF6StringERNS_14ExceptionStateE
    fun:_ZN7WebCore20IDBFactoryV8InternalL10openMethodERKN2v820FunctionCallbackInfoINS1_5ValueEEE
    fun:_ZN7WebCore20IDBFactoryV8InternalL18openMethodCallbackERKN2v820FunctionCallbackInfoINS1_5ValueEEE
 }