Add ZoomLevelChanged and DidChangeScrollOffset to RenderViewObserver

content/renderer/render_widget.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 37 matching lines @@
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkMallocPixelRef.h"
 #endif  // defined(OS_POSIX)
 
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebWidget.h"
 
 using WebKit::WebCompositionUnderline;
 using WebKit::WebCursorInfo;
 using WebKit::WebInputEvent;
 using WebKit::WebMouseEvent;
+using WebKit::WebMouseWheelEvent;
 using WebKit::WebNavigationPolicy;
 using WebKit::WebPagePopup;
 using WebKit::WebPoint;
 using WebKit::WebPopupMenu;
 using WebKit::WebPopupMenuInfo;
 using WebKit::WebPopupType;
 using WebKit::WebRange;
 using WebKit::WebRect;
 using WebKit::WebScreenInfo;
 using WebKit::WebSize;
@@ skipping 513 matching lines @@
 
   handling_input_event_ = false;
 
   if (!prevent_default) {
     if (WebInputEvent::isKeyboardEventType(input_event->type))
       DidHandleKeyEvent();
     if (WebInputEvent::isMouseEventType(input_event->type))
       DidHandleMouseEvent(*(static_cast<const WebMouseEvent*>(input_event)));
     if (WebInputEvent::isTouchEventType(input_event->type))
       DidHandleTouchEvent(*(static_cast<const WebTouchEvent*>(input_event)));
+    if (input_event->type == WebInputEvent::MouseWheel)
+      DidHandleWheelEvent(
+          *(static_cast<const WebMouseWheelEvent*>(input_event)));
   }
 }
 
 void RenderWidget::OnMouseCaptureLost() {
   if (webwidget_)
     webwidget_->mouseCaptureLost();
 }
 
 void RenderWidget::OnSetFocus(bool enable) {
   has_focus_ = enable;
@@ skipping 1092 matching lines @@
   }
 }
 
 bool RenderWidget::WillHandleMouseEvent(const WebKit::WebMouseEvent& event) {
   return false;
 }
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }