Make the virtual keyboard show up on the display with input focus.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 9c211fc9360204fee838b499d6369311d6cd65a8..bd785342f4c1401b3e6cc4465e741dfd13efa2b3 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -313,8 +313,6 @@ void Shell::OnRootWindowAdded(WmWindow* root_window) {
 }
 
 void Shell::CreateKeyboard() {
-  // TODO(bshe): Primary root window controller may not be the controller to
-  // attach virtual keyboard. See http://crbug.com/303429
   InitKeyboard();
   GetPrimaryRootWindowController()->ActivateKeyboard(
       keyboard::KeyboardController::GetInstance());
@@ -845,9 +843,17 @@ void Shell::InitKeyboard() {
             keyboard::KeyboardController::GetInstance());
       }
     }
+#if defined(OS_CHROMEOS)
+    keyboard::KeyboardController::ResetInstance(
+        new keyboard::KeyboardController(
+            wm_shell_->delegate()->CreateKeyboardUI(),
+            virtual_keyboard_controller_.get()));
+#else
     keyboard::KeyboardController::ResetInstance(
         new keyboard::KeyboardController(
-            wm_shell_->delegate()->CreateKeyboardUI()));
+            wm_shell_->delegate()->CreateKeyboardUI(), nullptr));
+
+#endif
   }
 }