Timer resolution test.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 5c9cd720bd74ca281485fdac701c09db6cf00c95..44cc85881ce96a98cca3bc9ec3881905358decf0 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -111,6 +111,40 @@
 #include "base/mac/foundation_util.h"
 #endif
 
+namespace {
+
+int run_count = 0;
+bool started = false;
+
+void AwesomeTicker(base::TimeTicks scheduled_at) {
+  if (!scheduled_at.is_null()) {
+    base::TimeTicks now = base::TimeTicks::HighResNow();
+    LOG(ERROR) << "Actual delay: " << (now - scheduled_at).InMicroseconds();
+    ++run_count;
+  }
+  if (run_count == 10) {
+    run_count = 0;
+    started = false;
+    return;
+  }
+  base::MessageLoop::current()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&AwesomeTicker, base::TimeTicks::HighResNow()),
+      base::TimeDelta::FromMicroseconds(16666));
+}
+
+void EnsureExperimentStarted() {
+  if (started)
+    return;
+  started = true;
+  base::MessageLoop::current()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&AwesomeTicker, base::TimeTicks()),
+      base::TimeDelta::FromSeconds(10));
+}
+
+}  // namespace
+
 // Cross-Site Navigations
 //
 // If a WebContentsImpl is told to navigate to a different web site (as
@@ -2524,6 +2558,7 @@ void WebContentsImpl::DidCommitProvisionalLoad(
                     observers_,
                     DidCommitProvisionalLoadForFrame(
                         render_frame_host, url, transition_type));
+  EnsureExperimentStarted();
 }
 
 void WebContentsImpl::DidNavigateMainFramePreCommit(