Use platform slop/timeout values for selection handle tap detection

content/browser/renderer_host/input/touch_selection_controller.cc

Index: content/browser/renderer_host/input/touch_selection_controller.cc
diff --git a/content/browser/renderer_host/input/touch_selection_controller.cc b/content/browser/renderer_host/input/touch_selection_controller.cc
index f27d6908bc96a6aec6e6dc0ee20ed40a93120e28..e904e283ee0716401cea8556353b8eba048032d1 100644
--- a/content/browser/renderer_host/input/touch_selection_controller.cc
+++ b/content/browser/renderer_host/input/touch_selection_controller.cc
@@ -29,8 +29,12 @@ TouchHandleOrientation ToTouchHandleOrientation(cc::SelectionBoundType type) {
 }  // namespace
 
 TouchSelectionController::TouchSelectionController(
-    TouchSelectionControllerClient* client)
+    TouchSelectionControllerClient* client,
+    base::TimeDelta tap_timeout,
+    float tap_slop)
     : client_(client),
+      tap_timeout_(tap_timeout),
+      tap_slop_(tap_slop),
       response_pending_input_event_(INPUT_EVENT_TYPE_NONE),
       start_orientation_(TOUCH_HANDLE_ORIENTATION_UNDEFINED),
       end_orientation_(TOUCH_HANDLE_ORIENTATION_UNDEFINED),
@@ -248,6 +252,14 @@ scoped_ptr<TouchHandleDrawable> TouchSelectionController::CreateDrawable() {
   return client_->CreateDrawable();
 }
 
+base::TimeDelta TouchSelectionController::GetTapTimeout() const {
+  return tap_timeout_;
+}
+
+float TouchSelectionController::GetTapSlop() const {
+  return tap_slop_;
+}
+
 void TouchSelectionController::ShowInsertionHandleAutomatically() {
   if (activate_insertion_automatically_)
     return;