Forward WM_VSCROLL and WM_HSCROLL messages from the LegacyRenderWidgetHostHWND class to its parent.

BUG=254545
R=cpu@chromium.org
TBR=jam

Review URL: https://codereview.chromium.org/165353006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251889 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/legacy_render_widget_host_win.cc

@@ -204,6 +204,12 @@ LRESULT LegacyRenderWidgetHostHWND::OnTouch(UINT message,
   return ::SendMessage(GetParent(), message, w_param, l_param);
 }
 
+LRESULT LegacyRenderWidgetHostHWND::OnScroll(UINT message,
+                                             WPARAM w_param,
+                                             LPARAM l_param) {
+  return ::SendMessage(GetParent(), message, w_param, l_param);
+}
+
 LRESULT LegacyRenderWidgetHostHWND::OnNCPaint(UINT message,
                                               WPARAM w_param,
                                               LPARAM l_param) {

content/browser/renderer_host/legacy_render_widget_host_win.h

@@ -71,6 +71,8 @@ class CONTENT_EXPORT LegacyRenderWidgetHostHWND
     MESSAGE_HANDLER_EX(WM_MOUSEACTIVATE, OnMouseActivate)
     MESSAGE_HANDLER_EX(WM_SETCURSOR, OnSetCursor)
     MESSAGE_HANDLER_EX(WM_TOUCH, OnTouch)
+    MESSAGE_HANDLER_EX(WM_VSCROLL, OnScroll)
+    MESSAGE_HANDLER_EX(WM_HSCROLL, OnScroll)
   END_MSG_MAP()
 
   HWND hwnd() { return m_hWnd; }
@@ -113,6 +115,7 @@ class CONTENT_EXPORT LegacyRenderWidgetHostHWND
                        BOOL& handled);
   LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnTouch(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnScroll(UINT message, WPARAM w_param, LPARAM l_param);
 
   LRESULT OnNCPaint(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnPaint(UINT message, WPARAM w_param, LPARAM l_param);