[EditCommandSource] Pass source through |CompositeEditCommand| ctor instead of |apply(source)|

third_party/WebKit/Source/core/editing/commands/ApplyStyleCommandTest.cpp

 // Copyright 2016 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 "core/editing/commands/ApplyStyleCommand.h"
 
 #include "core/css/StylePropertySet.h"
 #include "core/dom/Document.h"
 #include "core/editing/EditingTestBase.h"
 #include "core/editing/FrameSelection.h"
@@ skipping 23 matching lines @@
 
   LocalFrame* frame = document().frame();
   frame->selection().setSelection(
       SelectionInDOMTree::Builder()
           .collapse(Position(li, PositionAnchorType::BeforeAnchor))
           .build());
 
   MutableStylePropertySet* style =
       MutableStylePropertySet::create(HTMLQuirksMode);
   style->setProperty(CSSPropertyTextAlign, "center");
-  ApplyStyleCommand::create(document(), EditingStyle::create(style),
+  ApplyStyleCommand::create(document(), EditCommandSource::kDOM,
+                            EditingStyle::create(style),
                             InputEvent::InputType::FormatJustifyCenter,
                             ApplyStyleCommand::ForceBlockProperties)
-      ->apply(EditCommandSource::kDOM);
+      ->apply();
   // Shouldn't crash.
 }
 
 }  // namespace blink