Add new user script injection point: document_idle.

chrome/renderer/user_script_idle_scheduler.cc

+// Copyright (c) 2009 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 "chrome/renderer/user_script_idle_scheduler.h"
+
+#include "base/message_loop.h"
+#include "chrome/renderer/render_view.h"
+
+namespace {
+// The length of time to wait after the DOM is complete to try and run user
+// scripts.
+const int kUserScriptIdleTimeoutMs = 200;
+}
+
+UserScriptIdleScheduler::UserScriptIdleScheduler(RenderView* view,
+                                                 WebKit::WebFrame* frame)
+    : ALLOW_THIS_IN_INITIALIZER_LIST(method_factory_(this)), view_(view),
+  frame_(frame), has_run_(false) {

[abarth-chromium, 2009/10/31 07:07:39]

These should each be on a different line according to the style guide.

+}
+
+void UserScriptIdleScheduler::DidFinishDocumentLoad() {
+  MessageLoop::current()->PostDelayedTask(FROM_HERE,
+      method_factory_.NewRunnableMethod(&UserScriptIdleScheduler::MaybeRun),
+      kUserScriptIdleTimeoutMs);
+}
+
+void UserScriptIdleScheduler::DidFinishLoad() {
+  // Ensure that running scripts does not keep any progress UI running.
+  MessageLoop::current()->PostTask(FROM_HERE,
+      method_factory_.NewRunnableMethod(&UserScriptIdleScheduler::MaybeRun));
+}
+
+void UserScriptIdleScheduler::Cancel() {
+  view_ = NULL;
+  frame_ = NULL;
+}
+
+void UserScriptIdleScheduler::MaybeRun() {
+  if (!view_)
+    return;
+
+  DCHECK(frame_);
+  view_->OnUserScriptIdleLocation(frame_);
+  Cancel();
+  has_run_ = true;
+}