Fixed memory leaks in remoting_unittests.

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 # running overnight and removing outdated bugs/suppressions.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 3670 matching lines @@
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN12FileBrowseUIC1EP11TabContents
 }
 {
    bug_70782_i
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN9OptionsUIC1EP11TabContents
 }
-{
-   bug_70826
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_Z17NewRunnableMethodIN8remoting8protocol13MessageReaderEMS2_FvPNS0_14CompoundBufferEES4_EP14CancelableTaskPT_T0_RKT1_
-   fun:_ZN8remoting8protocol13MessageReader14OnDataReceivedEPN3net8IOBufferEi
-   fun:_ZN8remoting8protocol13MessageReader16HandleReadResultEi
-}