Iframe/div MD scrollbars get idle when mouse leaves the nested elements.

cc/input/scrollbar_animation_controller_thinning_unittest.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 "cc/input/scrollbar_animation_controller_thinning.h"
 
 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
 #include "cc/test/fake_impl_task_runner_provider.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/geometry_test_utils.h"
@@ skipping 410 matching lines @@
   // call Animate once to start the animation(initial the last_awaken_time_),
   // now you can jump x seconds.
   scrollbar_controller_->Animate(time);
   time += base::TimeDelta::FromSeconds(kDuration);
   scrollbar_controller_->Animate(time);
 
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
 
   // Capture
-  scrollbar_controller_->DidCaptureScrollbarBegin();
+  scrollbar_controller_->DidMouseDown();
   time += base::TimeDelta::FromSeconds(1);
   scrollbar_controller_->Animate(time);
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
 
   // test for 10 seconds, stay thick and dark
   for (int i = 0; i < 10; ++i) {
     // move away from bar.
     scrollbar_controller_->DidMouseMoveNear(26 + i);
     time += base::TimeDelta::FromSeconds(1);
     scrollbar_controller_->Animate(time);
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
   }
 
   // release
-  scrollbar_controller_->DidCaptureScrollbarEnd();
+  scrollbar_controller_->DidMouseUp();
 
   // get thickness and light
   time += base::TimeDelta::FromSeconds(1);
   scrollbar_controller_->Animate(time);
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
 
   time += base::TimeDelta::FromSeconds(1);
   scrollbar_controller_->Animate(time);
   EXPECT_FLOAT_EQ(0.9f, scrollbar_layer_->Opacity());
@@ skipping 20 matching lines @@
   // Move in
   scrollbar_controller_->DidMouseMoveNear(0);
 
   scrollbar_controller_->Animate(time);
   time += base::TimeDelta::FromSeconds(kDuration);
   scrollbar_controller_->Animate(time);
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
 
   // Capture
-  scrollbar_controller_->DidCaptureScrollbarBegin();
+  scrollbar_controller_->DidMouseDown();
   time += base::TimeDelta::FromSeconds(1);
   scrollbar_controller_->Animate(time);
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
 
   // test for 10 seconds, stay thick and dark
   for (int i = 0; i < 10; ++i) {
     // move away from bar.
     scrollbar_controller_->DidMouseMoveNear(26 + i);
     time += base::TimeDelta::FromSeconds(1);
     scrollbar_controller_->Animate(time);
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
   }
 
   // move to the bar.
   scrollbar_controller_->DidMouseMoveNear(0);
 
   // release
-  scrollbar_controller_->DidCaptureScrollbarEnd();
+  scrollbar_controller_->DidMouseUp();
 
   // stay thick and dark
   // test for 10 seconds, stay thick and dark
   for (int i = 0; i < 10; ++i) {
     time += base::TimeDelta::FromSeconds(1);
     scrollbar_controller_->Animate(time);
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
   }
 }
 
 // Move mouse on scrollbar and capture then move out of window. Confirm that
 // the bar stays thick and dark.
 TEST_F(ScrollbarAnimationControllerThinningTest,
        MouseCapturedAndExitWindowFromScrollbar) {
   base::TimeTicks time;
   time += base::TimeDelta::FromSeconds(1);
 
   // Move in
   scrollbar_controller_->DidMouseMoveNear(0);
 
   scrollbar_controller_->Animate(time);
   time += base::TimeDelta::FromSeconds(kDuration);
   scrollbar_controller_->Animate(time);
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
 
   // Capture
-  scrollbar_controller_->DidCaptureScrollbarBegin();
+  scrollbar_controller_->DidMouseDown();
   time += base::TimeDelta::FromSeconds(1);
   scrollbar_controller_->Animate(time);
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
   EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
 
   // move out of window
   scrollbar_controller_->DidMouseMoveOffScrollbar();
 
   // test for 10 seconds, stay thick and dark
   for (int i = 0; i < 10; ++i) {
     time += base::TimeDelta::FromSeconds(1);
     scrollbar_controller_->Animate(time);
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->Opacity());
     EXPECT_FLOAT_EQ(1.0f, scrollbar_layer_->thumb_thickness_scale_factor());
   }
 }
 
 }  // namespace
 }  // namespace cc