[Sync] Move change-related methods out of SyncManager::Observer

chrome/browser/sync/js/js_transaction_observer.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/js/js_transaction_observer.h"
 
 #include <string>
 
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 29 matching lines @@
 }
 
 namespace {
 
 // Max number of mutations we attempt to convert to values (to avoid
 // running out of memory).
 const size_t kMutationLimit = 300;
 
 }  // namespace
 
-void JsTransactionObserver::OnTransactionMutate(
-    const tracked_objects::Location& location,
-    const syncable::WriterTag& writer,
-    const syncable::ImmutableEntryKernelMutationMap& mutations,
+void JsTransactionObserver::OnTransactionWrite(
+    const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
     const syncable::ModelTypeBitSet& models_with_changes) {
   DCHECK(non_thread_safe_.CalledOnValidThread());
   if (!event_handler_.IsInitialized()) {
     return;
   }
   DictionaryValue details;
-  details.SetString("location", location.ToString());
-  details.SetString("writer", syncable::WriterTagToString(writer));
-  Value* mutations_value = NULL;
-  const size_t mutations_size = mutations.Get().size();
-  if (mutations_size <= kMutationLimit) {
-    mutations_value = syncable::EntryKernelMutationMapToValue(mutations.Get());
-  } else {
-    mutations_value =
-        Value::CreateStringValue(
-            base::Uint64ToString(static_cast<uint64>(mutations_size)) +
-            " mutations");
-  }
-  details.Set("mutations", mutations_value);
+  details.Set("writeTransactionInfo",
+              write_transaction_info.Get().ToValue(kMutationLimit));
   details.Set("modelsWithChanges",
               syncable::ModelTypeBitSetToValue(models_with_changes));
   HandleJsEvent(FROM_HERE, "onTransactionMutate", JsEventDetails(&details));
 }
 
 void JsTransactionObserver::OnTransactionEnd(
     const tracked_objects::Location& location,
     const syncable::WriterTag& writer) {
   DCHECK(non_thread_safe_.CalledOnValidThread());
   if (!event_handler_.IsInitialized()) {
@@ skipping 10 matching lines @@
     const std::string& name, const JsEventDetails& details) {
   if (!event_handler_.IsInitialized()) {
     NOTREACHED();
     return;
   }
   event_handler_.Call(from_here,
                       &JsEventHandler::HandleJsEvent, name, details);
 }
 
 }  // namespace browser_sync