Fix root ServerWindow size.

services/ui/ws/platform_display.cc

Index: services/ui/ws/platform_display.cc
diff --git a/services/ui/ws/platform_display.cc b/services/ui/ws/platform_display.cc
index 3073cba44cf834ccaf216713039dcbcf8eec5775..a490ff4ee70541f9f37ea7b5c343fb753c564705 100644
--- a/services/ui/ws/platform_display.cc
+++ b/services/ui/ws/platform_display.cc
@@ -73,8 +73,10 @@ void DefaultPlatformDisplay::Init(PlatformDisplayDelegate* delegate) {
   platform_window_ = base::MakeUnique<ui::WinWindow>(this, bounds);
 #elif defined(USE_X11)
   platform_window_ = base::MakeUnique<ui::X11Window>(this);
+  platform_window_->SetBounds(bounds);
 #elif defined(OS_ANDROID)
   platform_window_ = base::MakeUnique<ui::PlatformWindowAndroid>(this);
+  platform_window_->SetBounds(bounds);
 #elif defined(USE_OZONE)
   platform_window_ =
       ui::OzonePlatform::GetInstance()->CreatePlatformWindow(this, bounds);
@@ -82,7 +84,6 @@ void DefaultPlatformDisplay::Init(PlatformDisplayDelegate* delegate) {
   NOTREACHED() << "Unsupported platform";
 #endif
 
-  platform_window_->SetBounds(bounds);
   platform_window_->Show();
 }