[content shell] implement auto resize related WebTestDelegate interfaces

content/public/test/layouttest_support.h

Index: content/public/test/layouttest_support.h
diff --git a/content/public/test/layouttest_support.h b/content/public/test/layouttest_support.h
index d80123d3a28ab52eab1cc5b650f7d583d09c4314..4d0e444f0fb887df24cd81a2dfe604cbc4f796fb 100644
--- a/content/public/test/layouttest_support.h
+++ b/content/public/test/layouttest_support.h
@@ -72,6 +72,13 @@ void DisableSystemDragDrop();
 // Don't show modal popup menus.
 void DisableModalPopupMenus();
 
+// Control auto resize mode.
+void EnableAutoResizeMode(RenderView* render_view,
+                          const WebKit::WebSize& min_size,
+                          const WebKit::WebSize& max_size);
+void DisableAutoResizeMode(RenderView* render_view,
+                           const WebKit::WebSize& new_size);
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_LAYOUTTEST_SUPPORT_H_