Back out 155b9d4cb8cb (bug 1068474) for Marionette failures

layout/base/SelectionCarets.cpp

@@ -239,16 +239,6 @@ SelectionCarets::HandleEvent(WidgetEvent* aEvent)
     if (mDragMode == START_FRAME || mDragMode == END_FRAME) {
       if (mActiveTouchId == nowTouchId) {
         ptInRoot.y += mCaretCenterToDownPointOffsetY;
-
-        if (mDragMode == START_FRAME) {
-          if (ptInRoot.y > mDragDownYBoundary) {
-            ptInRoot.y = mDragDownYBoundary;
-          }
-        } else if (mDragMode == END_FRAME) {
-          if (ptInRoot.y < mDragUpYBoundary) {
-            ptInRoot.y = mDragUpYBoundary;
-          }
-        }
         return DragSelection(ptInRoot);
       }
 
@@ -525,14 +515,6 @@ SelectionCarets::UpdateSelectionCarets()
   SetEndFramePos(lastRectInCanvasFrame.BottomRight());
   SetVisibility(true);
 
-  nsRect firstRectInRootFrame = firstRectInStartFrame;
-  nsRect lastRectInRootFrame = lastRectInEndFrame;
-  nsLayoutUtils::TransformRect(startFrame, rootFrame, firstRectInRootFrame);
-  nsLayoutUtils::TransformRect(endFrame, rootFrame, lastRectInRootFrame);
-
-  mDragUpYBoundary = firstRectInRootFrame.BottomLeft().y;
-  mDragDownYBoundary = lastRectInRootFrame.TopRight().y;
-
   nsRect rectStart = GetStartFrameRect();
   nsRect rectEnd = GetEndFrameRect();
   bool isTilt = rectStart.Intersects(rectEnd);

layout/base/SelectionCarets.h

@@ -241,20 +241,6 @@ private:
   int32_t mActiveTouchId;
 
   nscoord mCaretCenterToDownPointOffsetY;
-
-  // The horizontal boundary is defined by the first selected frame which
-  // determines the star-tcaret position. When users drag the end-caert up,
-  // the touch input(pos.y) will be changed to not cross this boundary.
-  // Otherwise, the selection range changes to one character only
-  // which causes the bad user experience.
-  nscoord mDragUpYBoundary;
-  // The horizontal boundary is defined by the last selected frame which
-  // determines the end-caret position. When users drag the start-caert down,
-  // the touch input(pos.y) will be changed to not cross this boundary.
-  // Otherwise, the selection range changes to one character only
-  // which causes the bad user experience.
-  nscoord mDragDownYBoundary;
-
   DragMode mDragMode;
 
   // True if AsyncPanZoom is enabled