Update the suppression for intentional memcpy overlap 542575, move it to the proper section.

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 # running overnight and removing outdated bugs/suppressions.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 528 matching lines @@
 }
 {
    bug_415092
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base22PosixDynamicThreadPool7AddTaskEPNS_11PendingTaskE
    fun:_ZN4base22PosixDynamicThreadPool8PostTaskERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEE
    fun:_ZN4base12_GLOBAL__N_114WorkerPoolImpl8PostTaskERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEEb
    fun:_ZN4base10WorkerPool8PostTaskERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEEb
 }
+{
+   bug_542575 (Intentional)
+   Memcheck:Overlap
+   fun:memcpy@@GLIBC_2.14
+   ...
+   fun:BrotliDecompressBuffer
+   fun:_ZN3ots18ConvertWOFF2ToSFNTEPNS_4FontEPhmPKhm
+   fun:_ZN12_GLOBAL__N_112ProcessWOFF2EPN3ots12OpenTypeFileEPNS0_4FontEPNS0_9OTSStreamEPKhm
+   fun:_ZN3ots10OTSContext7ProcessEPNS_9OTSStreamEPKhmj
+   fun:_ZN5blink17OpenTypeSanitizer8sanitizeEv
+}
 
 #-----------------------------------------------------------------------
 # 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).
 
 {
    # webkit leak?  See http://crbug.com/9503
    bug_9503
    Memcheck:Leak
    ...
@@ skipping 2818 matching lines @@
    fun:_Znw*
    ...
    fun:_ZN7content21RenderProcessHostImpl4InitEv
    fun:_ZN7content22RenderFrameHostManager14InitRenderViewEPNS_18RenderViewHostImplEi
    fun:_ZN7content22RenderFrameHostManager8NavigateERK4GURLRKNS_20FrameNavigationEntryERKNS_19NavigationEntryImplE
    fun:_ZN7content13NavigatorImpl15NavigateToEntryEPNS_13FrameTreeNodeERKNS_20FrameNavigationEntryERKNS_19NavigationEntryImplENS_20NavigationController10ReloadTypeEb
    fun:_ZN7content13NavigatorImpl22NavigateToPendingEntryEPNS_13FrameTreeNodeERKNS_20FrameNavigationEntryENS_20NavigationController10ReloadTypeEb
    fun:_ZN7content24NavigationControllerImpl30NavigateToPendingEntryInternalENS_20NavigationController10ReloadTypeE
 }
 {
-   bug_542575
-   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
 }
 {
@@ skipping 21 matching lines @@
 {
    bug_558179
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7content27ServiceWorkerContextWrapperC1EPNS_14BrowserContextE
    fun:_ZN7content20StoragePartitionImpl6CreateEPNS_14BrowserContextEbRKN4base8FilePathE
    fun:_ZN7content23StoragePartitionImplMap3GetERKSsS2_b
    fun:_ZN7content12_GLOBAL__N_129GetStoragePartitionFromConfigEPNS_14BrowserContextERKSsS4_b
    fun:_ZN7content14BrowserContext26GetStoragePartitionForSiteEPS0_RK4GURL
 }