Revert "Touchpad scroll latching enabled for Mac behind flag."

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index a98eff09dad3f7e3631bb9233b0cdb2b671d1e75..770066ad0731c01420d05eb155e948cf7a07ff6d 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -681,7 +681,6 @@ TEST_F(LayerTreeHostImplTest, ScrollRootCallsCommitAndRedraw) {
   EXPECT_TRUE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(0, 10),
                                                       InputHandler::WHEEL));
   host_impl_->ScrollEnd(EndState().get());
-  host_impl_->ClearCurrentlyScrollingLayerForTesting();
   EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(),
                                                        InputHandler::WHEEL));
   EXPECT_TRUE(did_request_redraw_);
@@ -705,7 +704,6 @@ TEST_F(LayerTreeHostImplTest, ScrollActiveOnlyAfterScrollMovement) {
   host_impl_->ScrollBy(UpdateState(gfx::Point(), gfx::Vector2d(0, 10)).get());
   EXPECT_TRUE(host_impl_->IsActivelyScrolling());
   host_impl_->ScrollEnd(EndState().get());
-  host_impl_->ClearCurrentlyScrollingLayerForTesting();
   EXPECT_FALSE(host_impl_->IsActivelyScrolling());
 }
 
@@ -1032,7 +1030,6 @@ TEST_F(LayerTreeHostImplTest, NonFastScrollableRegionBasic) {
   EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(
       gfx::Point(25, 25), InputHandler::TOUCHSCREEN));
   host_impl_->ScrollEnd(EndState().get());
-  host_impl_->ClearCurrentlyScrollingLayerForTesting();
   EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(
       gfx::Point(75, 75), InputHandler::TOUCHSCREEN));
 
@@ -1045,7 +1042,6 @@ TEST_F(LayerTreeHostImplTest, NonFastScrollableRegionBasic) {
       gfx::Point(75, 75), InputHandler::TOUCHSCREEN));
   host_impl_->ScrollBy(UpdateState(gfx::Point(), gfx::Vector2d(0, 10)).get());
   host_impl_->ScrollEnd(EndState().get());
-  host_impl_->ClearCurrentlyScrollingLayerForTesting();
   EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(
       gfx::Point(75, 75), InputHandler::TOUCHSCREEN));
 }
@@ -1108,7 +1104,6 @@ TEST_F(LayerTreeHostImplTest, ScrollHandlerPresent) {
                           InputHandler::TOUCHSCREEN);
   EXPECT_TRUE(host_impl_->scroll_affects_scroll_handler());
   host_impl_->ScrollEnd(EndState().get());
-  host_impl_->ClearCurrentlyScrollingLayerForTesting();
   EXPECT_FALSE(host_impl_->scroll_affects_scroll_handler());
 }
 
@@ -2779,7 +2774,6 @@ class LayerTreeHostImplTestScrollbarAnimation : public LayerTreeHostImplTest {
     EXPECT_TRUE(animation_task_.Equals(base::Closure()));
 
     host_impl_->ScrollEnd(EndState().get());
-    host_impl_->ClearCurrentlyScrollingLayerForTesting();
     EXPECT_FALSE(did_request_next_frame_);
     EXPECT_FALSE(did_request_redraw_);
     if (expecting_animations) {
@@ -2873,7 +2867,6 @@ class LayerTreeHostImplTestScrollbarAnimation : public LayerTreeHostImplTest {
     EXPECT_TRUE(animation_task_.Equals(base::Closure()));
 
     host_impl_->ScrollEnd(EndState().get());
-    host_impl_->ClearCurrentlyScrollingLayerForTesting();
     EXPECT_FALSE(did_request_next_frame_);
     EXPECT_FALSE(did_request_redraw_);
     EXPECT_EQ(base::TimeDelta(), requested_animation_delay_);
@@ -9607,7 +9600,6 @@ TEST_F(LayerTreeHostImplVirtualViewportTest, FlingScrollBubblesToInner) {
     EXPECT_EQ(outer_scroll, host_impl_->CurrentlyScrollingLayer());
 
     host_impl_->ScrollEnd(EndState().get());
-    host_impl_->ClearCurrentlyScrollingLayerForTesting();
     EXPECT_EQ(nullptr, host_impl_->CurrentlyScrollingLayer());
 
     EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
@@ -9633,7 +9625,6 @@ TEST_F(LayerTreeHostImplVirtualViewportTest, FlingScrollBubblesToInner) {
     EXPECT_EQ(outer_scroll, host_impl_->CurrentlyScrollingLayer());
 
     host_impl_->ScrollEnd(EndState().get());
-    host_impl_->ClearCurrentlyScrollingLayerForTesting();
     EXPECT_EQ(nullptr, host_impl_->CurrentlyScrollingLayer());
 
     EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
@@ -9691,7 +9682,6 @@ TEST_F(LayerTreeHostImplVirtualViewportTest,
     outer_expected += scroll_delta;
     inner_expected += scroll_delta;
     host_impl_->ScrollEnd(EndState().get());
-    host_impl_->ClearCurrentlyScrollingLayerForTesting();
     EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(
         gfx::Point(), InputHandler::TOUCHSCREEN));
 
@@ -9764,7 +9754,6 @@ TEST_F(LayerTreeHostImplVirtualViewportTest,
             .did_scroll);
     EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), child_scroll);
     host_impl_->ScrollEnd(EndState().get());
-    host_impl_->ClearCurrentlyScrollingLayerForTesting();
     EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(
         gfx::Point(), InputHandler::TOUCHSCREEN));
   }
@@ -10414,7 +10403,6 @@ TEST_F(LayerTreeHostImplTimelinesTest, ScrollAnimatedAborted) {
                                                       InputHandler::WHEEL));
   std::unique_ptr<ScrollState> scroll_state_end = EndState();
   host_impl_->ScrollEnd(scroll_state_end.get());
-  host_impl_->ClearCurrentlyScrollingLayerForTesting();
   EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(),
                                                        InputHandler::WHEEL));