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

chrome/browser/gtk/tabs/tab_gtk.cc

Index: chrome/browser/gtk/tabs/tab_gtk.cc
diff --git a/chrome/browser/gtk/tabs/tab_gtk.cc b/chrome/browser/gtk/tabs/tab_gtk.cc
index 667cd8a71df83eeac0183746ca50001387a81df3..ca9b93dbadbd2de28c80c509a98981d05cf08e8d 100644
--- a/chrome/browser/gtk/tabs/tab_gtk.cc
+++ b/chrome/browser/gtk/tabs/tab_gtk.cc
@@ -227,10 +227,14 @@ void TabGtk::DidProcessEvent(GdkEvent* event) {
   GdkEventMotion* motion = reinterpret_cast<GdkEventMotion*>(event);
   GdkEventButton* button = reinterpret_cast<GdkEventButton*>(last_mouse_down_);
   bool dragging = gtk_drag_check_threshold(widget(),
-                                           button->x, button->y,
-                                           motion->x, motion->y);
-  if (dragging)
-    StartDragging(gfx::Point(button->x, button->y));
+                                           static_cast<gint>(button->x),
+                                           static_cast<gint>(button->y),
+                                           static_cast<gint>(motion->x),
+                                           static_cast<gint>(motion->y));
+  if (dragging) {
+    StartDragging(gfx::Point(static_cast<int>(button->x),
+                             static_cast<int>(button->y)));
+  }
 }
 
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