Plugin Power Saver Tiny: Treat completely obscured plugins as Tiny.

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 <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 195 matching lines @@
           render_frame()->GetWebFrame()->top()->getSecurityOrigin(),
           content_origin, gfx::Size(width, height),
           heuristic_run_before_ ? RenderFrame::DONT_RECORD_DECISION
                                 : RenderFrame::RECORD_DECISION);
 
   bool plugin_is_tiny_and_blocked =
       is_blocked_for_tinyness_ && status == RenderFrame::CONTENT_STATUS_TINY;
 
   // Early exit for plugins that we've discovered to be essential.
   if (!plugin_is_tiny_and_blocked &&
-      status != RenderFrame::CONTENT_STATUS_PERIPHERAL) {
+      status != RenderFrame::CONTENT_STATUS_PERIPHERAL &&
+      status != RenderFrame::CONTENT_STATUS_TINY) {
     MarkPluginEssential(
         heuristic_run_before_
             ? PluginInstanceThrottler::UNTHROTTLE_METHOD_BY_SIZE_CHANGE
             : PluginInstanceThrottler::UNTHROTTLE_METHOD_DO_NOT_RECORD);
 
     if (!heuristic_run_before_ &&
         status == RenderFrame::CONTENT_STATUS_ESSENTIAL_CROSS_ORIGIN_BIG) {
       render_frame()->WhitelistContentOrigin(content_origin);
     }
 
@@ skipping 139 matching lines @@
   return identifier_;
 }
 
 bool LoadablePluginPlaceholder::LoadingBlocked() const {
   DCHECK(allow_loading_);
   return is_blocked_for_tinyness_ || is_blocked_for_background_tab_ ||
          is_blocked_for_power_saver_poster_ || is_blocked_for_prerendering_;
 }
 
 }  // namespace plugins