[Sync] Move sync/{internal_api,syncable} into syncer namespace

sync/internal_api/http_bridge_unittest.cc

Index: sync/internal_api/http_bridge_unittest.cc
diff --git a/sync/internal_api/http_bridge_unittest.cc b/sync/internal_api/http_bridge_unittest.cc
index a4a4ceb1e6c9828a2f1fae9478d3fa3e36abd2ed..bd2e0f81e53649abe80ad770a597cef3f1822f39 100644
--- a/sync/internal_api/http_bridge_unittest.cc
+++ b/sync/internal_api/http_bridge_unittest.cc
@@ -12,7 +12,7 @@
 #include "sync/internal_api/public/http_bridge.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using browser_sync::HttpBridge;
+namespace syncer {
 
 namespace {
 // TODO(timsteele): Should use PathService here. See Chromium Issue 3113.
@@ -402,3 +402,5 @@ TEST_F(SyncHttpBridgeTest, AbortAndReleaseBeforeFetchComplete) {
   sync_thread.Stop();
   io_thread()->Stop();
 }
+
+}  // namespace syncer