[content shell] implement auto resize related WebTestDelegate interfaces

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index dc5a923125c1755b520c0835501f71b9a0353dec..419a8d09605b012d13531d540301ec587baf37bc 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -5295,8 +5295,14 @@ void RenderViewImpl::OnDisableAutoResize(const gfx::Size& new_size) {
   auto_resize_mode_ = false;
   webview()->disableAutoResizeMode();
 
-  Resize(new_size, physical_backing_size_, overdraw_bottom_height_,
-         resizer_rect_, is_fullscreen_, NO_RESIZE_ACK);
+  if (!new_size.IsEmpty()) {
+    Resize(new_size,
+           physical_backing_size_,
+           overdraw_bottom_height_,
+           resizer_rect_,
+           is_fullscreen_,
+           NO_RESIZE_ACK);
+  }
 }
 
 void RenderViewImpl::OnEnablePreferredSizeChangedMode() {
@@ -6511,6 +6517,15 @@ void RenderViewImpl::SetDeviceScaleFactorForTesting(float factor) {
     AutoResizeCompositor();
 }
 
+void RenderViewImpl::EnableAutoResizeForTesting(const gfx::Size& min_size,
+                                                const gfx::Size& max_size) {
+  OnEnableAutoResize(min_size, max_size);
+}
+
+void RenderViewImpl::DisableAutoResizeForTesting(const gfx::Size& new_size) {
+  OnDisableAutoResize(new_size);
+}
+
 void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
     TransportDIB::Handle dib_handle) {
   TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);