Don't call WebCacheManager::Remove(RPH_id) to clear webview's cache.

extensions/browser/guest_view/web_view/web_view_guest.cc

 // Copyright 2014 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 "extensions/browser/guest_view/web_view/web_view_guest.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 732 matching lines @@
     return false;
 
   if (removal_mask & webview::WEB_VIEW_REMOVE_DATA_MASK_CACHE) {
     // First clear http cache data and then clear the rest in
     // |ClearDataInternal|.
     int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
     // We need to clear renderer cache separately for our process because
     // StoragePartitionHttpCacheDataRemover::ClearData() does not clear that.
     web_cache::WebCacheManager::GetInstance()->ClearCacheForProcess(
         render_process_id);
-    web_cache::WebCacheManager::GetInstance()->Remove(render_process_id);
 
     base::Closure cache_removal_done_callback = base::Bind(
         &WebViewGuest::ClearDataInternal, weak_ptr_factory_.GetWeakPtr(),
         remove_since, removal_mask, callback);
     // StoragePartitionHttpCacheDataRemover removes itself when it is done.
     // components/, move |ClearCache| to WebViewGuest: http//crbug.com/471287.
     browsing_data::StoragePartitionHttpCacheDataRemover::CreateForRange(
         partition, remove_since, base::Time::Now())
         ->Remove(cache_removal_done_callback);
 
@@ skipping 734 matching lines @@
     std::unique_ptr<base::DictionaryValue> args(new base::DictionaryValue());
     DispatchEventToView(base::WrapUnique(
         new GuestViewEvent(webview::kEventExitFullscreen, std::move(args))));
   }
   // Since we changed fullscreen state, sending a Resize message ensures that
   // renderer/ sees the change.
   web_contents()->GetRenderViewHost()->GetWidget()->WasResized();
 }
 
 }  // namespace extensions