Add covariant overrides to TestRVH::GetProcess and TestRFH::GetProcess

content/test/test_render_view_host.cc

Index: content/test/test_render_view_host.cc
diff --git a/content/test/test_render_view_host.cc b/content/test/test_render_view_host.cc
index 2ffee6c9051cf3a9e97b11e39d75c3a1217513ca..d987aae3e16cb24d234a31560356abfb4e3f1a0c 100644
--- a/content/test/test_render_view_host.cc
+++ b/content/test/test_render_view_host.cc
@@ -253,6 +253,10 @@ bool TestRenderViewHost::IsFullscreenGranted() const {
   return RenderViewHostImpl::IsFullscreenGranted();
 }
 
+MockRenderProcessHost* TestRenderViewHost::GetProcess() const {
+  return static_cast<MockRenderProcessHost*>(RenderViewHostImpl::GetProcess());
+}
+
 void TestRenderViewHost::SimulateWasHidden() {
   WasHidden();
 }