Revert of Factor out setIndexedDBClientCreateFunction from blink::initialize

third_party/WebKit/Source/web/IndexedDBClientImpl.h

Index: third_party/WebKit/Source/web/IndexedDBClientImpl.h
diff --git a/third_party/WebKit/Source/web/IndexedDBClientImpl.h b/third_party/WebKit/Source/web/IndexedDBClientImpl.h
index 04a85883e221829449f85d5642256577055a2b69..69e4bfd129f53dbc53116ae9df3f74fde1bd849f 100644
--- a/third_party/WebKit/Source/web/IndexedDBClientImpl.h
+++ b/third_party/WebKit/Source/web/IndexedDBClientImpl.h
@@ -35,12 +35,6 @@
 
 class ExecutionContext;
 
-// TODO(haraken): Remove IndexedDBClientImpl.
-// This class is used to bypass the disallowed dependency from modules/ to web/
-// to call allowIndexedDB() from modules/. ChromeClient is a mechanism to bypass
-// the dependency but we cannot use ChromeClient here because
-// IndexedDBClientImpl is used by worker threads but ChromeClient works only
-// for the main thread.
 class IndexedDBClientImpl final : public IndexedDBClient {
 public:
     static IndexedDBClient* create();