Rename Supplement::host() to Supplement::supplementable()

third_party/WebKit/Source/modules/installedapp/NavigatorInstalledApp.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 "modules/installedapp/NavigatorInstalledApp.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
@@ skipping 70 matching lines @@
 
   appController->getInstalledApps(
       WebSecurityOrigin(
           scriptState->getExecutionContext()->getSecurityOrigin()),
       WTF::wrapUnique(
           new CallbackPromiseAdapter<RelatedAppArray, void>(resolver)));
   return promise;
 }
 
 InstalledAppController* NavigatorInstalledApp::controller() {
-  if (!host()->frame())
+  if (!supplementable()->frame())
     return nullptr;
 
-  return InstalledAppController::from(*host()->frame());
+  return InstalledAppController::from(*supplementable()->frame());
 }
 
 const char* NavigatorInstalledApp::supplementName() {
   return "NavigatorInstalledApp";
 }
 
 DEFINE_TRACE(NavigatorInstalledApp) {
   Supplement<Navigator>::trace(visitor);
 }
 
 }  // namespace blink