Implement input.ime.sendKeyEvents API.

ui/base/ime/input_method_base.h

Index: ui/base/ime/input_method_base.h
diff --git a/ui/base/ime/input_method_base.h b/ui/base/ime/input_method_base.h
index a0ac432c63f6d567d3c5492fdc59959519f0f76f..3a44e37f0ece9239278d04e482b222325ba628da 100644
--- a/ui/base/ime/input_method_base.h
+++ b/ui/base/ime/input_method_base.h
@@ -69,6 +69,7 @@ class UI_BASE_IME_EXPORT InputMethodBase
                              uint32_t cursor_pos,
                              bool visible) override;
   void DeleteSurroundingText(int32_t offset, uint32_t length) override;
+  void SendKeyEvent(KeyEvent* event) override;
 
   // Sends a fake key event for IME composing without physical key events.
   // Returns true if the faked key event is stopped propagation.
@@ -102,6 +103,10 @@ class UI_BASE_IME_EXPORT InputMethodBase
   // Gets the bounds of the composition text or cursor in |client|.
   std::vector<gfx::Rect> GetCompositionBounds(const TextInputClient* client);
 
+  // Indicates whether the IME extension is currently sending a fake key event.
+  // This is used in SendKeyEvent.
+  bool sending_key_event_;
+
  private:
   void SetFocusedTextInputClientInternal(TextInputClient* client);