Add base namespace to more values in sync and elsewhere.

sync/internal_api/js_sync_manager_observer.cc

Index: sync/internal_api/js_sync_manager_observer.cc
diff --git a/sync/internal_api/js_sync_manager_observer.cc b/sync/internal_api/js_sync_manager_observer.cc
index cbc9996092366d4a6802e1267d3c4a6428c80f79..01ddda834a3ecc0c2a95fe9ac1200cbeafff33c4 100644
--- a/sync/internal_api/js_sync_manager_observer.cc
+++ b/sync/internal_api/js_sync_manager_observer.cc
@@ -34,7 +34,7 @@ void JsSyncManagerObserver::OnSyncCycleCompleted(
   if (!event_handler_.IsInitialized()) {
     return;
   }
-  DictionaryValue details;
+  base::DictionaryValue details;
   details.Set("snapshot", snapshot.ToValue());
   HandleJsEvent(FROM_HERE, "onSyncCycleCompleted", JsEventDetails(&details));
 }
@@ -43,7 +43,7 @@ void JsSyncManagerObserver::OnConnectionStatusChange(ConnectionStatus status) {
   if (!event_handler_.IsInitialized()) {
     return;
   }
-  DictionaryValue details;
+  base::DictionaryValue details;
   details.SetString("status", ConnectionStatusToString(status));
   HandleJsEvent(FROM_HERE,
                 "onConnectionStatusChange", JsEventDetails(&details));
@@ -53,7 +53,7 @@ void JsSyncManagerObserver::OnUpdatedToken(const std::string& token) {
   if (!event_handler_.IsInitialized()) {
     return;
   }
-  DictionaryValue details;
+  base::DictionaryValue details;
   details.SetString("token", "<redacted>");
   HandleJsEvent(FROM_HERE, "onUpdatedToken", JsEventDetails(&details));
 }
@@ -63,7 +63,7 @@ void JsSyncManagerObserver::OnActionableError(
   if (!event_handler_.IsInitialized()) {
     return;
   }
-  DictionaryValue details;
+  base::DictionaryValue details;
   details.Set("syncError",  sync_error.ToValue());
   HandleJsEvent(FROM_HERE, "onActionableError",
                 JsEventDetails(&details));
@@ -79,7 +79,7 @@ void JsSyncManagerObserver::OnInitializationComplete(
   // Ignore the |js_backend| argument; it's not really convertible to
   // JSON anyway.
 
-  DictionaryValue details;
+  base::DictionaryValue details;
   details.Set("restoredTypes", ModelTypeSetToValue(restored_types));
 
   HandleJsEvent(FROM_HERE,