Move onMouseDown from WebWidgetClient to WebViewClient.

third_party/WebKit/public/web/WebViewClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 178 matching lines @@
 
     // Returns comma separated list of accept languages.
     virtual WebString acceptLanguages() { return WebString(); }
 
     // Called when the View has changed size as a result of an auto-resize.
     virtual void didAutoResize(const WebSize& newSize) {}
 
     // Called when the View acquires focus.
     virtual void didFocus() {}
 
+    // TODO(lfg): The callback below is exposed in RenderViewObserver and only
+    // used to implement autofill. We should figure out a better way to plumb
+    // this.
+    // Called immediately after a mousedown event is dispatched due to a mouse
+    // press or gesture tap.
+    // Note: This is called even when the mouse down event is prevent default.
+    virtual void onMouseDown(const WebNode& mouseDownNode) { }
+
     // Session history -----------------------------------------------------
 
     // Tells the embedder to navigate back or forward in session history by
     // the given offset (relative to the current position in session
     // history).
     virtual void navigateBackForwardSoon(int offset) { }
 
     // Returns the number of history items before/after the current
     // history item.
     virtual int historyBackListCount() { return 0; }
@@ skipping 50 matching lines @@
     // refactor WebView to not inherit from WebWidget.
     // WebWidgetClient overrides.
     void closeWidgetSoon() override {}
     void convertViewportToWindow(WebRect* rect) override {}
     void convertWindowToViewport(WebFloatRect* rect) override {}
     void didHandleGestureEvent(const WebGestureEvent& event, bool eventCancelled) override {}
     void didOverscroll(const WebFloatSize& overscrollDelta, const WebFloatSize& accumulatedOverscroll, const WebFloatPoint& positionInViewport, const WebFloatSize& velocityInViewport) override {}
     void didUpdateTextOfFocusedElementByNonUserInput() override {}
     void hasTouchEventHandlers(bool) override {}
     void initializeLayerTreeView() override {}
-    void onMouseDown(const WebNode& mouseDownNode) override {}
     void resetInputMethod() override {}
     WebScreenInfo screenInfo() override { return WebScreenInfo(); }
     void setToolTipText(const WebString&, WebTextDirection hint) override {}
     void setTouchAction(WebTouchAction touchAction) override {}
     void showImeIfNeeded() override {}
     void showUnhandledTapUIIfNeeded(const WebPoint& tappedPosition, const WebNode& tappedNode, bool pageChanged) override {}
     void show(WebNavigationPolicy) override {}
     WebRect windowResizerRect() override { return WebRect(); }
     virtual WebWidgetClient* widgetClient() { return this; }
 
 protected:
     ~WebViewClient() { }
 };
 
 } // namespace blink
 
 #endif