Paste popup is positioning properly during content scroll.

content/browser/renderer_host/input/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 "content/browser/renderer_host/input/touch_selection_controller.h"
 
 #include "base/logging.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 
 namespace content {
@@ skipping 155 matching lines @@
   if (is_selection_active_) {
     bool needs_animate = start_selection_handle_->Animate(frame_time);
     needs_animate |= end_selection_handle_->Animate(frame_time);
     return needs_animate;
   }
 
   return false;
 }
 
 void TouchSelectionController::OnHandleDragBegin(const TouchHandle& handle) {
-  if (&handle == insertion_handle_.get())
+  if (&handle == insertion_handle_.get()) {
+    client_->OnSelectionEvent(INSERTION_DRAG_BEGUN, GetStartPosition());
     return;
+  }
 
   if (&handle == start_selection_handle_.get()) {
     fixed_handle_position_ = end_selection_handle_->position() -
                              gfx::Vector2dF(0, GetEndLineHeight() / 2.f);
   } else {
     fixed_handle_position_ = start_selection_handle_->position() -
                              gfx::Vector2dF(0, GetStartLineHeight() / 2.f);
   }
 }
 
@@ skipping 174 matching lines @@
 }
 
 TouchHandle::AnimationStyle TouchSelectionController::GetAnimationStyle(
     bool was_active) const {
   return was_active && client_->SupportsAnimation()
              ? TouchHandle::ANIMATION_SMOOTH
              : TouchHandle::ANIMATION_NONE;
 }
 
 }  // namespace content