clang/win: Fix warnings to prepare for building without -Wno-reorder.

ui/gfx/screen_win.cc

Index: ui/gfx/screen_win.cc
diff --git a/ui/gfx/screen_win.cc b/ui/gfx/screen_win.cc
index f19117b80f8ffa9c2105880f5b21a1a2b2da3879..f01d40aa833d8a48a92e56ebe3311a8b784b3c40 100644
--- a/ui/gfx/screen_win.cc
+++ b/ui/gfx/screen_win.cc
@@ -87,9 +87,10 @@ std::vector<gfx::Display> GetDisplays() {
 namespace gfx {
 
 ScreenWin::ScreenWin()
-    : displays_(GetDisplays()),
-      singleton_hwnd_observer_(new SingletonHwndObserver(
-          base::Bind(&ScreenWin::OnWndProc, base::Unretained(this)))) {}
+    : singleton_hwnd_observer_(new SingletonHwndObserver(
+          base::Bind(&ScreenWin::OnWndProc, base::Unretained(this)))),
+      displays_(GetDisplays()) {
+}
 
 ScreenWin::~ScreenWin() {}