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 30bc374d1db7ae182aff010ad4027e98645563c9..c9aa95ec5f88e0022b5120282e0b9d664e6fd7b5 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -687,7 +687,6 @@ 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_);
@@ -711,7 +710,6 @@ 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());
 }
 
@@ -1038,7 +1036,6 @@ 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));
 
@@ -1051,7 +1048,6 @@ 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));
 }
@@ -1114,7 +1110,6 @@ 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());
 }
 
@@ -2788,7 +2783,6 @@ 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) {
@@ -2882,7 +2876,6 @@ 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_);
@@ -9375,7 +9368,6 @@ TEST_F(LayerTreeHostImplVirtualViewportTest, FlingScrollBubblesToInner) {
     EXPECT_EQ(inner_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());
@@ -9401,7 +9393,6 @@ TEST_F(LayerTreeHostImplVirtualViewportTest, FlingScrollBubblesToInner) {
     EXPECT_EQ(inner_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());
@@ -9459,7 +9450,6 @@ 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));
 
@@ -9532,7 +9522,6 @@ 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));
   }
@@ -10182,7 +10171,6 @@ 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));