Revert "Handle GTK enter and leave notification events and pass them to WebKit as "

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

Index: chrome/browser/renderer_host/render_widget_host_view_gtk.cc
diff --git a/chrome/browser/renderer_host/render_widget_host_view_gtk.cc b/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
index e89aef2cbe47debe0333e769c382306da71f6c6a..250e0ab3ba204275cf2283da34de34592726d24b 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
+++ b/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
@@ -60,10 +60,7 @@ class RenderWidgetHostViewGtkWidget {
                                   GDK_BUTTON_PRESS_MASK |
                                   GDK_BUTTON_RELEASE_MASK |
                                   GDK_KEY_PRESS_MASK |
-                                  GDK_KEY_RELEASE_MASK |
-                                  GDK_FOCUS_CHANGE_MASK |
-                                  GDK_ENTER_NOTIFY_MASK |
-                                  GDK_LEAVE_NOTIFY_MASK);
+                                  GDK_KEY_RELEASE_MASK);
     GTK_WIDGET_SET_FLAGS(widget, GTK_CAN_FOCUS);
 
     g_signal_connect(widget, "size-allocate",
@@ -86,11 +83,6 @@ class RenderWidgetHostViewGtkWidget {
                      G_CALLBACK(ButtonPressReleaseEvent), host_view);
     g_signal_connect(widget, "motion-notify-event",
                      G_CALLBACK(MouseMoveEvent), host_view);
-    g_signal_connect(widget, "enter-notify-event",
-                     G_CALLBACK(CrossingEvent), host_view);
-    g_signal_connect(widget, "leave-notify-event",
-                     G_CALLBACK(CrossingEvent), host_view);
-
     // Connect after so that we are called after the handler installed by the
     // TabContentsView which handles zoom events.
     g_signal_connect_after(widget, "scroll-event",
@@ -265,14 +257,6 @@ class RenderWidgetHostViewGtkWidget {
     return FALSE;
   }
 
-  static gboolean CrossingEvent(GtkWidget* widget, GdkEventCrossing* event,
-                                RenderWidgetHostViewGtk* host_view) {
-    host_view->GetRenderWidgetHost()->ForwardMouseEvent(
-        WebInputEventFactory::mouseEvent(event));
-
-    return FALSE;
-  }
-
   static gboolean MouseScrollEvent(GtkWidget* widget, GdkEventScroll* event,
                                    RenderWidgetHostViewGtk* host_view) {
     // If the user is holding shift, translate it into a horizontal scroll. We