Change the keyboard bounds when moving to another display.

ui/keyboard/keyboard_controller.cc

Index: ui/keyboard/keyboard_controller.cc
diff --git a/ui/keyboard/keyboard_controller.cc b/ui/keyboard/keyboard_controller.cc
index 674685b2658514392b3234f1774866e98b647261..d930696fe4ebe04c81b19c018c770d9aff2d461a 100644
--- a/ui/keyboard/keyboard_controller.cc
+++ b/ui/keyboard/keyboard_controller.cc
@@ -283,14 +283,7 @@ void KeyboardController::SetKeyboardMode(KeyboardMode mode) {
   if (keyboard_mode_ == FLOATING) {
     NotifyKeyboardBoundsChanging(gfx::Rect());
   } else if (keyboard_mode_ == FULL_WIDTH) {
-    // TODO(bshe): revisit this logic after we decide to support resize virtual
-    // keyboard.
-    int keyboard_height = GetContainerWindow()->bounds().height();
-    const gfx::Rect& root_bounds = container_->GetRootWindow()->bounds();
-    gfx::Rect new_bounds = root_bounds;
-    new_bounds.set_y(root_bounds.height() - keyboard_height);
-    new_bounds.set_height(keyboard_height);
-    GetContainerWindow()->SetBounds(new_bounds);
+    AdjustKeyboardBounds();
     // No animation added, so call ShowAnimationFinished immediately.
     ShowAnimationFinished();
   }
@@ -319,6 +312,7 @@ void KeyboardController::OnWindowHierarchyChanged(
 void KeyboardController::OnWindowAddedToRootWindow(aura::Window* window) {
   if (!window->GetRootWindow()->HasObserver(this))
     window->GetRootWindow()->AddObserver(this);
+  AdjustKeyboardBounds();
 }
 
 void KeyboardController::OnWindowRemovingFromRootWindow(aura::Window* window,
@@ -511,4 +505,19 @@ void KeyboardController::HideAnimationFinished() {
     observer.OnKeyboardHidden();
 }
 
+void KeyboardController::AdjustKeyboardBounds() {
+  if (keyboard_mode_ == FLOATING) {

[bshe, 2017/01/11 14:37:35]

nit: if (keyboard_mode == FLOATING) return;

[yhanada, 2017/01/12 14:26:11]

Done.

+    // When keyboard is floating, no resize is necessary.
+  } else if (keyboard_mode_ == FULL_WIDTH) {
+    // TODO(bshe): revisit this logic after we decide to support resize virtual
+    // keyboard.
+    int keyboard_height = GetContainerWindow()->bounds().height();
+    const gfx::Rect& root_bounds = container_->GetRootWindow()->bounds();
+    gfx::Rect new_bounds = root_bounds;
+    new_bounds.set_y(root_bounds.height() - keyboard_height);
+    new_bounds.set_height(keyboard_height);
+    GetContainerWindow()->SetBounds(new_bounds);
+  }
+}
+
 }  // namespace keyboard