Remove unused WebTestProxy paint/canvas code

content/test/layouttest_support.cc

Index: content/test/layouttest_support.cc
diff --git a/content/test/layouttest_support.cc b/content/test/layouttest_support.cc
index 52deab8e51a72143f26553dcaf178718bac2fda1..f183e5cb3e3f0f2dac9e7b54ce57ba08b4ccbb18 100644
--- a/content/test/layouttest_support.cc
+++ b/content/test/layouttest_support.cc
@@ -138,7 +138,6 @@ void ForceResizeRenderView(RenderView* render_view,
                            const WebSize& new_size) {
   RenderViewImpl* render_view_impl = static_cast<RenderViewImpl*>(render_view);
   render_view_impl->ForceResizeForTesting(new_size);
-  GetWebTestProxyBase(render_view_impl)->DidForceResize();
 }
 
 void SetDeviceScaleFactor(RenderView* render_view, float factor) {