[Aura] Fix HtmlDialogBrowserTest.SizeWindow.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index fe072371cf935de41d05e89b99a5d2d0315a2625..54e6c24ae49421381fed92e96a6f1e1f3756338a 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -405,6 +405,9 @@ void RenderWidgetHostViewAura::UnlockMouse() {
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, aura::WindowDelegate implementation:
 
+void RenderWidgetHostViewAura::OnBoundsChanging(gfx::Rect* new_bounds) {
+}
+
 void RenderWidgetHostViewAura::OnBoundsChanged(const gfx::Rect& old_bounds,
                                                const gfx::Rect& new_bounds) {
   // We don't care about this one, we are always sized via SetSize() or