Increase the slop value for text selection offsets

ui/touch_selection/touch_selection_controller.cc

 // Copyright 2014 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 "ui/touch_selection/touch_selection_controller.h"
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 
 namespace ui {
 namespace {
 
 gfx::Vector2dF ComputeLineOffsetFromBottom(const SelectionBound& bound) {
   gfx::Vector2dF line_offset =
       gfx::ScaleVector2d(bound.edge_top() - bound.edge_bottom(), 0.5f);
-  // An offset of 5 DIPs is sufficient for most line sizes. For small lines,
+  // An offset of 8 DIPs is sufficient for most line sizes. For small lines,
   // using half the line height avoids synthesizing a point on a line above
   // (or below) the intended line.
-  const gfx::Vector2dF kMaxLineOffset(5.f, 5.f);
+  const gfx::Vector2dF kMaxLineOffset(8.f, 8.f);
   line_offset.SetToMin(kMaxLineOffset);
   line_offset.SetToMax(-kMaxLineOffset);
   return line_offset;
 }
 
 TouchHandleOrientation ToTouchHandleOrientation(SelectionBound::Type type) {
   switch (type) {
     case SelectionBound::LEFT:
       return TouchHandleOrientation::LEFT;
     case SelectionBound::RIGHT:
@@ skipping 557 matching lines @@
     base::TimeDelta duration = base::TimeTicks::Now() - selection_start_time_;
     UMA_HISTOGRAM_CUSTOM_TIMES("Event.TouchSelection.WasDraggedDuration",
                                duration,
                                base::TimeDelta::FromMilliseconds(500),
                                base::TimeDelta::FromSeconds(60),
                                60);
   }
 }
 
 }  // namespace ui