[Sync] Rename csync namespace to syncer

tools/valgrind/tsan/suppressions.txt

 # There are a few 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 # running overnight and removing outdated bugs/suppressions.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 763 matching lines @@
    ThreadSanitizer:Race
    ...
    fun:TestProfileSyncService::~TestProfileSyncService
    fun:scoped_ptr::reset
    fun:ProfileSyncServiceAutofillTest::TearDown
 }
 {
    bug_107903_b
    ThreadSanitizer:Race
    ...
-   fun:csync::SyncManager::SyncInternal::ShutdownOnSyncThread
-   fun:csync::SyncManager::ShutdownOnSyncThread
+   fun:syncer::SyncManager::SyncInternal::ShutdownOnSyncThread
+   fun:syncer::SyncManager::ShutdownOnSyncThread
    fun:browser_sync::SyncBackendHost::Core::DoShutdown
    fun:base::internal::RunnableAdapter::Run
 }
 {
    bug_107903_c
    ThreadSanitizer:Race
    fun:syncable::DirectoryChangeDelegate::~DirectoryChangeDelegate
-   fun:csync::SyncManager::SyncInternal::~SyncInternal
-   fun:csync::SyncManager::~SyncManager
+   fun:syncer::SyncManager::SyncInternal::~SyncInternal
+   fun:syncer::SyncManager::~SyncManager
    fun:scoped_ptr::reset
    fun:browser_sync::SyncBackendHost::Core::DoShutdown
    fun:base::internal::RunnableAdapter::Run
 }
 {
   bug_108408
   ThreadSanitizer:Race
   fun:base::subtle::RefCountedBase::AddRef
   fun:base::RefCounted::AddRef
   fun:net::HttpCache::Transaction::DoCacheWriteData
@@ skipping 174 matching lines @@
 }
 {
   bug_134891
   ThreadSanitizer:Race
   ...
   fun:base::MD5Update
   fun:media::VideoFrame::HashFrameForTesting
   fun:media::PipelineIntegrationTestBase::OnVideoRendererPaint
   fun:base::internal::RunnableAdapter::Run
 }