Reland: Implement Aura side of unified touch text selection for contents

ui/touch_selection/touch_selection_controller.cc

Index: ui/touch_selection/touch_selection_controller.cc
diff --git a/ui/touch_selection/touch_selection_controller.cc b/ui/touch_selection/touch_selection_controller.cc
index 3d52b4c3e423f276b65541c1491b0e260411fb86..87f09e142bb6bb3508420bb99e67cfe2dd6a3dcd 100644
--- a/ui/touch_selection/touch_selection_controller.cc
+++ b/ui/touch_selection/touch_selection_controller.cc
@@ -66,11 +66,11 @@ TouchSelectionController::TouchSelectionController(
 TouchSelectionController::~TouchSelectionController() {
 }
 
-void TouchSelectionController::OnSelectionBoundsChanged(
+bool TouchSelectionController::OnSelectionBoundsUpdated(
     const SelectionBound& start,
     const SelectionBound& end) {
   if (start == start_ && end_ == end)
-    return;
+    return false;
 
   start_ = start;
   end_ = end;
@@ -80,7 +80,7 @@ void TouchSelectionController::OnSelectionBoundsChanged(
   if (!activate_selection_automatically_ &&
       !activate_insertion_automatically_) {
     DCHECK_EQ(INPUT_EVENT_TYPE_NONE, response_pending_input_event_);
-    return;
+    return false;
   }
 
   // Ensure that |response_pending_input_event_| is cleared after the method
@@ -113,16 +113,17 @@ void TouchSelectionController::OnSelectionBoundsChanged(
        start_orientation_ != TouchHandleOrientation::UNDEFINED &&
        end_orientation_ != TouchHandleOrientation::UNDEFINED)) {
     OnSelectionChanged();
-    return;
+    return true;
   }
 
   if (start_orientation_ == TouchHandleOrientation::CENTER &&
       selection_editable_) {
     OnInsertionChanged();
-    return;
+    return true;
   }
 
   HideAndDisallowShowingAutomatically();
+  return true;
 }
 
 bool TouchSelectionController::WillHandleTouchEvent(const MotionEvent& event) {
@@ -217,6 +218,13 @@ void TouchSelectionController::OnSelectionEmpty(bool empty) {
   ResetCachedValuesIfInactive();
 }
 
+void TouchSelectionController::OnNativeViewMoved() {
+  if (is_selection_active_)
+    client_->OnSelectionEvent(SELECTION_MOVED);
+  else if (is_insertion_active_)
+    client_->OnSelectionEvent(INSERTION_MOVED);
+}
+
 bool TouchSelectionController::Animate(base::TimeTicks frame_time) {
   if (is_insertion_active_)
     return insertion_handle_->Animate(frame_time);
@@ -299,11 +307,10 @@ void TouchSelectionController::OnHandleDragUpdate(const TouchHandle& handle,
                                    ? GetStartLineOffset()
                                    : GetEndLineOffset();
   gfx::PointF line_position = position + line_offset;
-  if (&handle == insertion_handle_.get()) {
+  if (&handle == insertion_handle_.get())
     client_->MoveCaret(line_position);
-  } else {
+  else
     client_->MoveRangeSelectionExtent(line_position);
-  }
 }
 
 void TouchSelectionController::OnHandleDragEnd(const TouchHandle& handle) {