Revert restartInput change off the M57 release branch.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 3fbbd3ca38af3558e7d5ebe7e5b0fbbc9f186159..d8e563d48a552a4c543d3afa2ba255b7788fcbc6 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -266,7 +266,6 @@ class CONTENT_EXPORT RenderWidget
   void SetInputHandler(RenderWidgetInputHandler* input_handler) override;
   void ShowVirtualKeyboard() override;
   void UpdateTextInputState() override;
-  void ClearTextInputState() override;
   bool WillHandleGestureEvent(const blink::WebGestureEvent& event) override;
   bool WillHandleMouseEvent(const blink::WebMouseEvent& event) override;
 
@@ -291,6 +290,7 @@ class CONTENT_EXPORT RenderWidget
                       blink::WebTextDirection hint) override;
   void setWindowRect(const blink::WebRect&) override;
   blink::WebScreenInfo screenInfo() override;
+  void resetInputMethod() override;
   void didHandleGestureEvent(const blink::WebGestureEvent& event,
                              bool event_cancelled) override;
   void didOverscroll(const blink::WebFloatSize& overscrollDelta,