Add optimization for CHROMIUM_subscribe_uniform extension.

content/public/test/mock_render_process_host.cc

Index: content/public/test/mock_render_process_host.cc
diff --git a/content/public/test/mock_render_process_host.cc b/content/public/test/mock_render_process_host.cc
index 014998fdbed674925ab8307f19d1a3bee6aef252..b0514a41df37474c3a9e9ef7b1dd82a061c54238 100644
--- a/content/public/test/mock_render_process_host.cc
+++ b/content/public/test/mock_render_process_host.cc
@@ -234,6 +234,20 @@ const base::TimeTicks& MockRenderProcessHost::GetInitTimeForNavigationMetrics()
   return dummy_time;
 }
 
+bool MockRenderProcessHost::SubscribeUniformEnabled() const {
+  return false;
+}
+
+void MockRenderProcessHost::OnAddSubscription(unsigned int target) {
+}
+
+void MockRenderProcessHost::OnRemoveSubscription(unsigned int target) {
+}
+
+void MockRenderProcessHost::SendUpdateValueState(
+    unsigned int target, const gpu::ValueState& state) {
+}
+
 void MockRenderProcessHost::FilterURL(bool empty_allowed, GURL* url) {
   RenderProcessHostImpl::FilterURL(this, empty_allowed, url);
 }