Revert 202620 "Collect tab timing information for use in telemen..."

trunk/src/content/renderer/stats_collection_observer.cc

-// Copyright 2013 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/stats_collection_observer.h"
-
-#include "base/time.h"
-#include "content/renderer/render_view_impl.h"
-
-namespace content {
-
-StatsCollectionObserver::StatsCollectionObserver(RenderViewImpl* render_view)
-    : RenderViewObserver(render_view) {
-}
-
-StatsCollectionObserver::~StatsCollectionObserver() {
-}
-
-void StatsCollectionObserver::DidStartLoading() {
-  DCHECK(start_time_.is_null());
-  start_time_ = base::TimeTicks::Now();
-}
-
-void StatsCollectionObserver::DidStopLoading() {
-  DCHECK(stop_time_.is_null());
-  stop_time_ = base::TimeTicks::Now();
-
-  // Stop observing so we don't get called again.
-  RenderViewImpl* impl = static_cast<RenderViewImpl*>(render_view());
-  impl->RemoveObserver(this);
-}
-
-}  // namespace content