Fixed memleak in JsonHostConfig.

tools/heapcheck/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 # running overnight and removing outdated bugs/suppressions.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 757 matching lines @@
 }
 
 {
    bug_46715
    Heapcheck:Leak
    fun:WebCore::makeExternalString
    fun:WebCore::v8ExternalStringSlow
 }
 
 {
-   bug_46882_a
-   Heapcheck:Leak
-   ...
-   fun:remoting::JsonHostConfig::Read
-}
-
-{
-   bug_46882_b
-   Heapcheck:Leak
-   ...
-   fun:remoting::JsonHostConfigTest_Write_Test::TestBody
-}
-
-{
-   bug_46882_c
-   Heapcheck:Leak
-   fun:base::MessageLoopProxy::CreateForCurrentThread
-   fun:remoting::JsonHostConfigTest::SetUp
-}
-
-{
    bug_46886
    Heapcheck:Leak
    ...
    fun:net::::SpdyHttpStreamTest_SendRequest_Test::TestBody
 }
 
 {
    bug_19775_a
    Heapcheck:Leak
    ...
@@ skipping 16 matching lines @@
    fun:HistoryService::BackendDelegate::DBLoaded
    fun:history::HistoryBackend::Init
 }
 
 {
    bug_19775_d
    Heapcheck:Leak
    ...
    fun:ProfileManagerTest_CreateAndUseTwoProfiles_Test::TestBody
 }