Dispatch IndexedDB IPC messages to worker threads

content/renderer/renderer_webidbcursor_impl.cc

Index: content/renderer/renderer_webidbcursor_impl.cc
diff --git a/content/renderer/renderer_webidbcursor_impl.cc b/content/renderer/renderer_webidbcursor_impl.cc
index 58113ad2707909a6805a03225443126bd1015e0a..eff8f84afc8df1195add1aa4c460d25825838f77 100644
--- a/content/renderer/renderer_webidbcursor_impl.cc
+++ b/content/renderer/renderer_webidbcursor_impl.cc
@@ -28,8 +28,7 @@ RendererWebIDBCursorImpl::~RendererWebIDBCursorImpl() {
   // any such pointers.
   ChildThread::current()->Send(new IndexedDBHostMsg_CursorDestroyed(
       idb_cursor_id_));
-  IndexedDBDispatcher* dispatcher =
-      RenderThreadImpl::current()->indexed_db_dispatcher();
+  IndexedDBDispatcher* dispatcher = IndexedDBDispatcher::Instance();
   dispatcher->CursorDestroyed(idb_cursor_id_);
 }
 
@@ -55,8 +54,7 @@ WebSerializedScriptValue RendererWebIDBCursorImpl::value() const {
 void RendererWebIDBCursorImpl::update(const WebSerializedScriptValue& value,
                                       WebIDBCallbacks* callbacks,
                                       WebExceptionCode& ec) {
-  IndexedDBDispatcher* dispatcher =
-      RenderThreadImpl::current()->indexed_db_dispatcher();
+  IndexedDBDispatcher* dispatcher = IndexedDBDispatcher::Instance();
   dispatcher->RequestIDBCursorUpdate(
       content::SerializedScriptValue(value), callbacks, idb_cursor_id_, &ec);
 }
@@ -64,8 +62,7 @@ void RendererWebIDBCursorImpl::update(const WebSerializedScriptValue& value,
 void RendererWebIDBCursorImpl::continueFunction(const WebIDBKey& key,
                                                 WebIDBCallbacks* callbacks,
                                                 WebExceptionCode& ec) {
-  IndexedDBDispatcher* dispatcher =
-      RenderThreadImpl::current()->indexed_db_dispatcher();
+  IndexedDBDispatcher* dispatcher = IndexedDBDispatcher::Instance();
 
   if (key.type() == WebIDBKey::InvalidType) {
     // No key, so this would qualify for a prefetch.
@@ -100,8 +97,7 @@ void RendererWebIDBCursorImpl::continueFunction(const WebIDBKey& key,
 
 void RendererWebIDBCursorImpl::deleteFunction(WebIDBCallbacks* callbacks,
                                               WebExceptionCode& ec) {
-  IndexedDBDispatcher* dispatcher =
-      RenderThreadImpl::current()->indexed_db_dispatcher();
+  IndexedDBDispatcher* dispatcher = IndexedDBDispatcher::Instance();
   dispatcher->RequestIDBCursorDelete(callbacks, idb_cursor_id_, &ec);
 }
 
@@ -168,8 +164,7 @@ void RendererWebIDBCursorImpl::ResetPrefetchCache() {
     return;
   }
 
-  IndexedDBDispatcher* dispatcher =
-      RenderThreadImpl::current()->indexed_db_dispatcher();
+  IndexedDBDispatcher* dispatcher = IndexedDBDispatcher::Instance();
   dispatcher->RequestIDBCursorPrefetchReset(used_prefetches_,
                                             prefetch_keys_.size(),
                                             idb_cursor_id_);