Plugin Power Saver: Implement size-based heuristic for peripheral content.

content/browser/plugin_content_origin_whitelist.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 "content/browser/plugin_content_origin_whitelist.h"
+
+#include "content/common/frame_messages.h"
+#include "content/public/browser/navigation_details.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/web_contents.h"
+
+namespace content {
+
+PluginContentOriginWhitelist::PluginContentOriginWhitelist(
+    WebContents* web_contents)
+    : WebContentsObserver(web_contents) {
+}
+
+PluginContentOriginWhitelist::~PluginContentOriginWhitelist() {
+}
+
+void PluginContentOriginWhitelist::RenderFrameCreated(
+    RenderFrameHost* render_frame_host) {
+  if (!whitelist_.empty()) {
+    Send(new FrameMsg_UpdatePluginContentOriginWhitelist(
+        render_frame_host->GetRoutingID(), whitelist_));
+  }
+}
+
+bool PluginContentOriginWhitelist::OnMessageReceived(
+    const IPC::Message& message,
+    RenderFrameHost* render_frame_host) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PluginContentOriginWhitelist, message)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_PluginContentOriginAllowed,
+                        OnPluginContentOriginAllowed)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+void PluginContentOriginWhitelist::DidNavigateMainFrame(
+    const LoadCommittedDetails& details,
+    const FrameNavigateParams& params) {
+  if (details.is_navigation_to_different_page()) {
+    // We expect RenderFrames to clear their replicated whitelist independently.
+    whitelist_.clear();
+  }
+}
+
+void PluginContentOriginWhitelist::OnPluginContentOriginAllowed(
+    const GURL& content_origin) {
+  whitelist_.insert(content_origin);
+
+  web_contents()->SendToAllFrames(
+      new FrameMsg_UpdatePluginContentOriginWhitelist(
+          MSG_ROUTING_NONE, whitelist_));
+}
+
+}  // namespace content