Move LoadProgressTracker to the browser process.

content/renderer/load_progress_tracker.cc

-// Copyright (c) 2012 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/renderer/load_progress_tracker.h"
-
-#include "base/bind.h"
-#include "base/message_loop/message_loop.h"
-#include "content/common/view_messages.h"
-#include "content/renderer/render_view_impl.h"
-
-namespace content {
-namespace {
-
-const int kMinimumDelayBetweenUpdatesMS = 100;
-
-// This matches what blink's ProgrssTracker has traditionally used for a
-// minimum progress value.
-const double kMinimumProgress = 0.1;
-
-}
-
-LoadProgressTracker::LoadProgressTracker(RenderViewImpl* render_view)
-    : render_view_(render_view),
-      total_progress_(0.0),
-      weak_factory_(this) {
-}
-
-LoadProgressTracker::~LoadProgressTracker() {
-}
-
-void LoadProgressTracker::DidStartLoading(int frame_routing_id) {
-  progresses_[frame_routing_id] = kMinimumProgress;
-  SendChangeLoadProgress();
-}
-
-void LoadProgressTracker::DidStopLoading(int frame_routing_id) {
-  if (progresses_.find(frame_routing_id) == progresses_.end())
-    return;
-
-  // Load stopped while we were still tracking load.  Make sure we update
-  // progress based on this frame's completion.
-  progresses_[frame_routing_id] = 1.0;
-  SendChangeLoadProgress();
-  // Then we clean-up our states.
-  if (total_progress_ == 1.0)
-    ResetStates();
-}
-
-void LoadProgressTracker::DidChangeLoadProgress(int frame_routing_id,
-                                                double progress) {
-  progresses_[frame_routing_id] = progress;
-
-  // We send the progress change to the browser immediately for the first and
-  // last updates.  Also, since the message loop may be pretty busy when a page
-  // is loaded, it might not execute a posted task in a timely manner so we make
-  // sure to immediately send progress report if enough time has passed.
-  base::TimeDelta min_delay =
-      base::TimeDelta::FromMilliseconds(kMinimumDelayBetweenUpdatesMS);
-  if (progress == 1.0 || last_time_progress_sent_.is_null() ||
-      base::TimeTicks::Now() - last_time_progress_sent_ > min_delay) {
-    // If there is a pending task to send progress, it is now obsolete.
-    weak_factory_.InvalidateWeakPtrs();
-    SendChangeLoadProgress();
-    if (total_progress_ == 1.0)
-      ResetStates();
-    return;
-  }
-
-  if (weak_factory_.HasWeakPtrs())
-    return;
-
-  base::MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      base::Bind(&LoadProgressTracker::SendChangeLoadProgress,
-                 weak_factory_.GetWeakPtr()),
-      min_delay);
-}
-
-void LoadProgressTracker::SendChangeLoadProgress() {
-  last_time_progress_sent_ = base::TimeTicks::Now();
-  double progress = 0.0;
-  unsigned frameCount = 0;
-  ProgressMap::iterator end = progresses_.end();
-  for (ProgressMap::iterator it = progresses_.begin(); it != end; ++it) {
-    progress += it->second;
-    frameCount++;
-  }
-  if (frameCount == 0)
-    return;
-  progress /= frameCount;
-  DCHECK(progress <= 1.0);
-
-  if (progress <= total_progress_)
-    return;
-  total_progress_ = progress;
-
-  render_view_->Send(
-      new ViewHostMsg_DidChangeLoadProgress(render_view_->routing_id(),
-                                            progress));
-}
-
-void LoadProgressTracker::ResetStates() {
-  progresses_.clear();
-  total_progress_ = 0.0;
-  weak_factory_.InvalidateWeakPtrs();
-  last_time_progress_sent_ = base::TimeTicks();
-}
-
-}  // namespace content