Revert 173457 It breaks the scrolling benchmark because smoothScrollBy's

callback is never invoked.
> Telemtry: hooks "chrome.gpuBenchmarking.smoothScrollBy" with java on android.
> 
> In order to provide more realistic benchmarks, instead of shortcutting in native via mousewheels,
> let Telemetry cross all the boundaries and synthesize MotionEvents all the way up in java.
> 
> BUG=
> TEST=./tools/perf/run_multipage_benchmarks --browser=system smoothness_benchmark tools/perf/page_sets/key_mobile_sites.json
> 
> 
> Review URL: https://chromiumcodereview.appspot.com/11415227

TBR=bulach@chromium.org
BUG=166521
Review URL: https://codereview.chromium.org/11613022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@173752 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 2 insertions, 28 deletions

diff --git a/content/port/browser/smooth_scroll_gesture.cc b/content/port/browser/smooth_scroll_gesture.cc
deleted file mode 100644
index b783fc0..0000000
--- a/content/port/browser/smooth_scroll_gesture.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-// 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/port/browser/smooth_scroll_gesture.h"
-
-namespace content {
-
-double SmoothScrollGesture::Tick(
-    base::TimeTicks now, double desired_interval_ms) {
-  double position_delta = 10;
-  if (!last_tick_time_.is_null()) {
-    double velocity = 10 / desired_interval_ms;
-    double time_delta = (now - last_tick_time_).InMillisecondsF();
-    position_delta = velocity * time_delta;
-  }
-
-  last_tick_time_ = now;
-  return position_delta;
-}
-
-}  // namespace content
diff --git a/content/port/browser/smooth_scroll_gesture.h b/content/port/browser/smooth_scroll_gesture.h
index 3b7bec7..4e2c1d9 100644
--- a/content/port/browser/smooth_scroll_gesture.h
+++ b/content/port/browser/smooth_scroll_gesture.h
@@ -14,9 +14,10 @@ class RenderWidgetHost;
 
 // This is a base class representing a single scroll gesture. These gestures are
 // paired with the rendering benchmarking system to (automatically) measure how
-// smoothly chrome is responding to user input.
+// smoothnly chrome is responding to user input.
 class SmoothScrollGesture : public base::RefCounted<SmoothScrollGesture> {
  public:
+
   // When called, the gesture should compute its state at the provided timestamp
   // and send the right input events to the provided RenderWidgetHost to
   // simulate the gesture having run up to that point in time.
@@ -28,11 +29,6 @@ class SmoothScrollGesture : public base::RefCounted<SmoothScrollGesture> {
  protected:
   friend class base::RefCounted<SmoothScrollGesture>;
   virtual ~SmoothScrollGesture() {}
-
-  double Tick(base::TimeTicks now, double desired_interval_ms);
-
- private:
-  base::TimeTicks last_tick_time_;
 };
 
 } // namespace content