Plugin Power Saver: Improve Poster behavior for essential plugins.

chrome/renderer/plugins/power_saver_info.h

+// 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.
+
+#ifndef CHROME_RENDERER_PLUGINS_POWER_SAVER_INFO_H_
+#define CHROME_RENDERER_PLUGINS_POWER_SAVER_INFO_H_
+
+#include <string>
+
+#include "ui/gfx/geometry/size.h"
+#include "url/gurl.h"
+
+namespace blink {
+struct WebPluginParams;
+}
+
+namespace content {
+class RenderFrame;
+struct WebPluginInfo;
+}
+
+// This contains information specifying the plugin's Power Saver behavior.
+// The default constructor has Plugin Power Saver disabled.
+struct PowerSaverInfo {
+  PowerSaverInfo();
+
+  // Determines the PowerSaverInfo using the peripheral content heuristic.
+  static PowerSaverInfo Get(content::RenderFrame* render_frame,
+                            bool power_saver_setting_on,
+                            const blink::WebPluginParams& params,
+                            const content::WebPluginInfo& plugin_info,
+                            const GURL& document_url);
+
+  // Whether power saver should be enabled.
+  bool power_saver_enabled;
+
+  // Whether the plugin should be deferred because it is in a background tab.
+  bool blocked_for_background_tab;
+
+  // The poster image specified in image 'srcset' attribute format.
+  std::string poster_attribute;
+
+  // Used to resolve relative paths in |poster_attribute|.
+  GURL base_url;
+
+  // Specify this to provide partially obscured plugins a centered poster image.
+  gfx::Size custom_poster_size;
+};
+
+#endif  // CHROME_RENDERER_PLUGINS_POWER_SAVER_INFO_H_