x11: Move XInput2 availability information out of the message pump.

base/message_loop/message_pump_x11.cc

Index: base/message_loop/message_pump_x11.cc
diff --git a/base/message_loop/message_pump_x11.cc b/base/message_loop/message_pump_x11.cc
index dd8b965e69568b3710211e045ec834e4db86e70f..35dcc040348d983124eb87836558b6479c80ade2 100644
--- a/base/message_loop/message_pump_x11.cc
+++ b/base/message_loop/message_pump_x11.cc
@@ -53,7 +53,7 @@ GSourceFuncs XSourceFuncs = {
 Display* g_xdisplay = NULL;
 int g_xinput_opcode = -1;
 
-bool InitializeXInput2Internal() {
+bool InitializeXInput2() {
   Display* display = MessagePumpX11::GetDefaultXDisplay();
   if (!display)
     return false;
@@ -97,11 +97,6 @@ Window FindEventTarget(const NativeEvent& xev) {
   return target;
 }
 
-bool InitializeXInput2() {
-  static bool xinput2_supported = InitializeXInput2Internal();
-  return xinput2_supported;
-}
-
 bool InitializeXkb() {
   Display* display = MessagePumpX11::GetDefaultXDisplay();
   if (!display)
@@ -153,11 +148,6 @@ Display* MessagePumpX11::GetDefaultXDisplay() {
   return g_xdisplay;
 }
 
-// static
-bool MessagePumpX11::HasXInput2() {
-  return InitializeXInput2();
-}
-
 #if defined(TOOLKIT_GTK)
 // static
 MessagePumpX11* MessagePumpX11::Current() {