Remove code doing a no-op due to float -> int rounding.

chrome/browser/gtk/tab_contents_drag_source.cc

 // Copyright (c) 2009 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 "chrome/browser/gtk/tab_contents_drag_source.h"
 
 #include "app/gtk_dnd_util.h"
 #include "base/mime_util.h"
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
@@ skipping 97 matching lines @@
 
 void TabContentsDragSource::DidProcessEvent(GdkEvent* event) {
   if (event->type != GDK_MOTION_NOTIFY)
     return;
 
   GdkEventMotion* event_motion = reinterpret_cast<GdkEventMotion*>(event);
   gfx::Point client = gtk_util::ClientPoint(GetContentNativeView());
 
   if (tab_contents()->render_view_host()) {
     tab_contents()->render_view_host()->DragSourceMovedTo(
-        client.x(), client.y(), event_motion->x_root, event_motion->y_root);
+        client.x(), client.y(),
+        static_cast<int>(event_motion->x_root),
+        static_cast<int>(event_motion->y_root));
   }
 }
 
 void TabContentsDragSource::OnDragDataGet(
     GdkDragContext* context, GtkSelectionData* selection_data,
     guint target_type, guint time) {
   const int bits_per_byte = 8;
 
   switch (target_type) {
     case GtkDndUtil::TEXT_PLAIN: {
@@ skipping 68 matching lines @@
 
   if (tab_contents()->render_view_host())
     tab_contents()->render_view_host()->DragSourceSystemDragEnded();
 
   drop_data_.reset();
 }
 
 gfx::NativeView TabContentsDragSource::GetContentNativeView() const {
   return tab_contents_view_->GetContentNativeView();
 }