Implement touch selection for RWHVV.

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 bb7f266585d8dafe3cb12a0da343cddca641dc62..e3b1e13ad62600d6d41e510bbb8e7ded3306882c 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
+++ b/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
@@ -835,7 +835,9 @@ void RenderWidgetHostViewGtk::SetTooltipText(const std::wstring& tooltip_text) {
 }
 
 void RenderWidgetHostViewGtk::SelectionChanged(const std::string& text,
-                                               const ui::Range& range) {
+                                               const ui::Range& range,
+                                               const gfx::Point& start,
+                                               const gfx::Point& end) {
   if (!text.empty()) {
     GtkClipboard* x_clipboard = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
     gtk_clipboard_set_text(x_clipboard, text.c_str(), text.length());