Implement monotonically increasing time for WebKit.

webkit/glue/webkitclient_impl.cc

Index: webkit/glue/webkitclient_impl.cc
diff --git a/webkit/glue/webkitclient_impl.cc b/webkit/glue/webkitclient_impl.cc
index 7d44361e086858fa7d2e023e5cac09fa6db8744e..34c35797cc24446dfabe12b6572547d3ea8f784b 100644
--- a/webkit/glue/webkitclient_impl.cc
+++ b/webkit/glue/webkitclient_impl.cc
@@ -440,6 +440,11 @@ double WebKitClientImpl::currentTime() {
   return base::Time::Now().ToDoubleT();
 }
 
+double WebKitClientImpl::monotonicallyIncreasingTime() {
+  return base::TimeTicks::Now().ToInternalValue() /
+      static_cast<double>(base::Time::kMicrosecondsPerSecond);
+}
+
 void WebKitClientImpl::cryptographicallyRandomValues(
     unsigned char* buffer, size_t length) {
   base::RandBytes(buffer, length);