[Sync] Rename csync namespace to syncer

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 # running overnight and removing outdated bugs/suppressions.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 980 matching lines @@
    ...
    fun:net::CookieMonster::CookieMonsterTask::InvokeCallback
 }
 {
    bug_96904
    Heapcheck:Leak
    ...
    fun:TestURLRequestContextGetter::GetURLRequestContext
    fun:*SingleLoginAttempt
    fun:notifier::Login::StartConnection
-   fun:csync::InvalidationNotifier::UpdateCredentials
-   fun:csync::NonBlockingInvalidationNotifier::Core::UpdateCredentials
+   fun:syncer::InvalidationNotifier::UpdateCredentials
+   fun:syncer::NonBlockingInvalidationNotifier::Core::UpdateCredentials
    fun:void DispatchToMethod
 }
 {
    bug_98967
    Heapcheck:Leak
    ...
    fun:V8ValueConverterImplTest_WeirdTypes_Test::TestBody
 }
 {
    bug_99166_a
@@ skipping 325 matching lines @@
    fun:FilePath::AppendASCII
    fun:TraceSubscriberStdioTest_CanWriteDataToFile_Test::TestBody
 }
 {
    bug_117389
    Heapcheck:Leak
    ...
    fun:TestURLRequestContextGetter::GetURLRequestContext
    ...
    fun:notifier::Login::StartConnection
-   fun:csync::InvalidationNotifier::UpdateCredentials
-   fun:csync::NonBlockingInvalidationNotifier::Core::UpdateCredentials
+   fun:syncer::InvalidationNotifier::UpdateCredentials
+   fun:syncer::NonBlockingInvalidationNotifier::Core::UpdateCredentials
 }
 {
    bug_124758
    Heapcheck:Leak
    fun:sqlite3MemMalloc
    fun:crypto::RSAPrivateKey::FindFromPublicKeyInfo
    fun:crypto::RSAPrivateKeyNSSTest_*_Test::TestBody
 }
 {
    bug_125129_a
@@ skipping 111 matching lines @@
    fun:gfx::RenderTextLinux::EnsureLayout
    fun:gfx::RenderText::IndexOfAdjacentGrapheme
    fun:gfx::RenderTextTest_GraphemePositions_Test::TestBody
 }
 {
    bug_134717
    Heapcheck:Leak
    fun:ui::InputMethodIBus::CreateContext
    fun:ui::InputMethodIBus::Init
 }