Implement progress bar spec (determinate and indeterminate).

ui/gfx/animation/linear_animation.cc

 // Copyright (c) 2011 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 "ui/gfx/animation/linear_animation.h"
 
 #include <math.h>
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "ui/gfx/animation/animation_container.h"
 #include "ui/gfx/animation/animation_delegate.h"
 
 using base::Time;
 using base::TimeDelta;
 
 namespace gfx {
 
+// How many frames per second to target.
+static const int kDefaultFrameRateHz = 60;
+
 static TimeDelta CalculateInterval(int frame_rate) {
   int timer_interval = 1000000 / frame_rate;
   if (timer_interval < 10000)
     timer_interval = 10000;
   return TimeDelta::FromMicroseconds(timer_interval);
 }
 
-LinearAnimation::LinearAnimation(int frame_rate,
+LinearAnimation::LinearAnimation(int frame_rate, AnimationDelegate* delegate)
+    : LinearAnimation(0, frame_rate, delegate) {}
+
+LinearAnimation::LinearAnimation(AnimationDelegate* delegate)
+    : LinearAnimation(kDefaultFrameRateHz, delegate) {}
+
+LinearAnimation::LinearAnimation(int duration,
+                                 int frame_rate,
                                  AnimationDelegate* delegate)
     : Animation(CalculateInterval(frame_rate)),
       state_(0.0),
       in_end_(false) {
   set_delegate(delegate);
-}
-
-LinearAnimation::LinearAnimation(int duration,
-                                 int frame_rate,
-                                 AnimationDelegate* delegate)
-    : Animation(CalculateInterval(frame_rate)),
-      duration_(TimeDelta::FromMilliseconds(duration)),
-      state_(0.0),
-      in_end_(false) {
-  set_delegate(delegate);
   SetDuration(duration);
 }
 
 double LinearAnimation::GetCurrentValue() const {
   // Default is linear relationship, subclass to adapt.
   return state_;
 }
 
 void LinearAnimation::SetCurrentValue(double new_value) {
   new_value = std::max(0.0, std::min(1.0, new_value));
@@ skipping 49 matching lines @@
   // Set state_ to ensure we send ended to delegate and not canceled.
   state_ = 1;
   AnimateToState(1.0);
 }
 
 bool LinearAnimation::ShouldSendCanceledFromStop() {
   return state_ != 1;
 }
 
 }  // namespace gfx