Send IndexedDB observations through IDBDatabaseCallbacks.

content/child/indexed_db/webidbfactory_impl.cc

Index: content/child/indexed_db/webidbfactory_impl.cc
diff --git a/content/child/indexed_db/webidbfactory_impl.cc b/content/child/indexed_db/webidbfactory_impl.cc
index 888c7fbe4e7d555b8eb1d111bcc358f2098e926c..7d11079ec3d6a7f196ed73c39127f9f0c75908e4 100644
--- a/content/child/indexed_db/webidbfactory_impl.cc
+++ b/content/child/indexed_db/webidbfactory_impl.cc
@@ -4,11 +4,9 @@
 
 #include "content/child/indexed_db/webidbfactory_impl.h"
 
-#include "content/child/child_thread_impl.h"
 #include "content/child/indexed_db/indexed_db_callbacks_impl.h"
 #include "content/child/indexed_db/indexed_db_database_callbacks_impl.h"
 #include "content/child/storage_util.h"
-#include "content/public/child/worker_thread.h"
 #include "ipc/ipc_sync_channel.h"
 #include "mojo/public/cpp/bindings/strong_associated_binding.h"
 #include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
@@ -38,8 +36,7 @@ class WebIDBFactoryImpl::IOThreadHelper {
 
   void GetDatabaseNames(std::unique_ptr<IndexedDBCallbacksImpl> callbacks,
                         const url::Origin& origin);
-  void Open(int32_t worker_thread,
-            const base::string16& name,
+  void Open(const base::string16& name,
             int64_t version,
             int64_t transaction_id,
             std::unique_ptr<IndexedDBCallbacksImpl> callbacks,
@@ -91,8 +88,8 @@ void WebIDBFactoryImpl::open(const WebString& name,
   io_runner_->PostTask(
       FROM_HERE,
       base::Bind(&IOThreadHelper::Open, base::Unretained(io_helper_),
-                 WorkerThread::GetCurrentId(), base::string16(name), version,
-                 transaction_id, base::Passed(&callbacks_impl),
+                 base::string16(name), version, transaction_id,
+                 base::Passed(&callbacks_impl),
                  base::Passed(&database_callbacks_impl), url::Origin(origin)));
 }
 
@@ -150,14 +147,13 @@ void WebIDBFactoryImpl::IOThreadHelper::GetDatabaseNames(
 }
 
 void WebIDBFactoryImpl::IOThreadHelper::Open(
-    int32_t worker_thread,
     const base::string16& name,
     int64_t version,
     int64_t transaction_id,
     std::unique_ptr<IndexedDBCallbacksImpl> callbacks,
     std::unique_ptr<IndexedDBDatabaseCallbacksImpl> database_callbacks,
     const url::Origin& origin) {
-  GetService()->Open(worker_thread, GetCallbacksProxy(std::move(callbacks)),
+  GetService()->Open(GetCallbacksProxy(std::move(callbacks)),
                      GetDatabaseCallbacksProxy(std::move(database_callbacks)),
                      origin, name, version, transaction_id);
 }