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

chrome/browser/gtk/tabs/dragged_tab_gtk.cc

Index: chrome/browser/gtk/tabs/dragged_tab_gtk.cc
diff --git a/chrome/browser/gtk/tabs/dragged_tab_gtk.cc b/chrome/browser/gtk/tabs/dragged_tab_gtk.cc
index 2ddb607148ba408b0134634294e34e17db81d487..5809cd18ab4d0bbbd9e1e5b9652808c49b1b71cd 100644
--- a/chrome/browser/gtk/tabs/dragged_tab_gtk.cc
+++ b/chrome/browser/gtk/tabs/dragged_tab_gtk.cc
@@ -263,8 +263,9 @@ void DraggedTabGtk::SetContainerShapeMask(GdkPixbuf* pixbuf) {
     // border).
     cairo_identity_matrix(cairo_context);
     cairo_set_source_rgba(cairo_context, 1.0f, 1.0f, 1.0f, 1.0f);
-    int tab_height = kScalingFactor * gdk_pixbuf_get_height(pixbuf) -
-                     kDragFrameBorderSize;
+    int tab_height = static_cast<int>(kScalingFactor *
+                                      gdk_pixbuf_get_height(pixbuf) -
+                                      kDragFrameBorderSize);
     cairo_rectangle(cairo_context,
                     0, tab_height,
                     size.width(), size.height() - tab_height);
@@ -295,8 +296,10 @@ gboolean DraggedTabGtk::OnExposeEvent(GtkWidget* widget,
   }
 
   // Only used when not attached.
-  int tab_height = kScalingFactor * gdk_pixbuf_get_height(pixbuf);
-  int tab_width = kScalingFactor * gdk_pixbuf_get_width(pixbuf);
+  int tab_height = static_cast<int>(kScalingFactor *
+                                    gdk_pixbuf_get_height(pixbuf));
+  int tab_width = static_cast<int>(kScalingFactor *
+                                   gdk_pixbuf_get_width(pixbuf));
 
   // Draw the render area.
   if (dragged_tab->backing_store_ && !dragged_tab->attached_) {