Force layout and invalidation for new plugin content

components/plugins/renderer/loadable_plugin_placeholder.cc

 // Copyright 2015 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 "components/plugins/renderer/loadable_plugin_placeholder.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/json/string_escape.h"
 #include "base/strings/string_piece.h"
@@ skipping 311 matching lines @@
 void LoadablePluginPlaceholder::HideCallback() {
   RenderThread::Get()->RecordAction(UserMetricsAction("Plugin_Hide_Click"));
   HidePlugin();
 }
 
 void LoadablePluginPlaceholder::DidFinishLoadingCallback() {
   finished_loading_ = true;
   if (message_.length() > 0)
     UpdateMessage();
 
+  // Ensure that we force a layout and paint invalidation for the new
+  // content. This will cause the container invalidation to be acted upon.
+  blink::WebFrame* frame = GetFrame();

[Bernhard Bauer, 2015/04/07 11:22:48]

Nit: This variable saves only five characters, we can just inline the call :)

+  blink::WebView* view = frame->view();
+  view->setNeedsLayoutAndFullPaintInvalidation();
+
   // Wait for the placeholder to finish loading to hide the premade plugin.
   // This is necessary to prevent a flicker.
   if (premade_throttler_ && !placeholder_was_replaced_)
     premade_throttler_->SetHiddenForPlaceholder(true /* hidden */);
 }
 
 void LoadablePluginPlaceholder::SetPluginInfo(
     const content::WebPluginInfo& plugin_info) {
   plugin_info_ = plugin_info;
 }
 
 const content::WebPluginInfo& LoadablePluginPlaceholder::GetPluginInfo() const {
   return plugin_info_;
 }
 
 void LoadablePluginPlaceholder::SetIdentifier(const std::string& identifier) {
   identifier_ = identifier;
 }
 
 bool LoadablePluginPlaceholder::LoadingBlocked() const {
   DCHECK(allow_loading_);
   return is_blocked_for_background_tab_ || is_blocked_for_power_saver_poster_ ||
          is_blocked_for_prerendering_;
 }
 
 }  // namespace plugins