New accessibility virtual keyboard behavior in non-sticky mode.

ui/base/ime/text_input_client.h

Index: ui/base/ime/text_input_client.h
diff --git a/ui/base/ime/text_input_client.h b/ui/base/ime/text_input_client.h
index 57bbba47cefdc88ee53f3c77628d5a5e25b2d0ce..b5bb2c3c2730d26372ea6a74c3f3c18574eaab05 100644
--- a/ui/base/ime/text_input_client.h
+++ b/ui/base/ime/text_input_client.h
@@ -159,6 +159,10 @@ class UI_BASE_IME_EXPORT TextInputClient {
   // TextInputClient.
   virtual void EnsureCaretNotInRect(const gfx::Rect& rect) = 0;
 
+  // Called when this input client is no longer focused. Used to restore window
+  // bounds when moved by accessibility virtual keyboard.
+  virtual void OnClientFocusLost() {}

[Shu Chen, 2017/03/14 14:42:30]

Why adding this? RWHVA is a FocusChangeObserver and TextField is a View which
has View::OnBlur.

[yhanada, 2017/03/15 12:54:32]

This will also be called when VK size is changed for some reason or VK moves to
another display.

+
   // Returns true if |command| is currently allowed to be executed.
   virtual bool IsTextEditCommandEnabled(TextEditCommand command) const = 0;