Make LayerTreeHost::animateLayers take a wall clock time in addition to a monotonic time

webkit/compositor_bindings/web_layer_tree_view_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "web_layer_tree_view_impl.h"
 
 #include "base/command_line.h"
 #include "cc/font_atlas.h"
 #include "cc/input_handler.h"
 #include "cc/layer.h"
@@ skipping 132 matching lines @@
 bool WebLayerTreeViewImpl::commitRequested() const
 {
     return m_layerTreeHost->commitRequested();
 }
 
 void WebLayerTreeViewImpl::composite()
 {
     m_layerTreeHost->composite();
 }
 
+// TODO(ajuma): Remove this after the WebKit patch to use the 2-argument version lands.
 void WebLayerTreeViewImpl::updateAnimations(double frameBeginTimeSeconds)
 {
     base::TimeTicks frameBeginTime = base::TimeTicks::FromInternalValue(frameBeginTimeSeconds * base::Time::kMicrosecondsPerSecond);
-    m_layerTreeHost->updateAnimations(frameBeginTime);
+    m_layerTreeHost->updateAnimations(frameBeginTime, base::Time::Now());
+}
+
+void WebLayerTreeViewImpl::updateAnimations(double monotonicFrameBeginTimeSeconds, double wallClockFrameBeginTimeSeconds)
+{
+    base::TimeTicks monotonicFrameBeginTime = base::TimeTicks::FromInternalValue(monotonicFrameBeginTimeSeconds * base::Time::kMicrosecondsPerSecond);
+    base::Time wallClockFrameBeginTime = base::Time::FromInternalValue(wallClockFrameBeginTimeSeconds* base::Time::kMicrosecondsPerSecond);

[Ian Vollick, 2013/01/15 03:27:37]

It looks like Time has a ::FromDoubleT method that could be useful here.

[ajuma, 2013/01/15 16:24:08]

Done.

+    m_layerTreeHost->updateAnimations(monotonicFrameBeginTime, wallClockFrameBeginTime);
 }
 
 void WebLayerTreeViewImpl::didStopFlinging()
 {
     m_layerTreeHost->didStopFlinging();
 }
 
 bool WebLayerTreeViewImpl::compositeAndReadback(void *pixels, const WebRect& rect)
 {
     return m_layerTreeHost->compositeAndReadback(pixels, rect);
@@ skipping 115 matching lines @@
 {
     m_client->didCompleteSwapBuffers();
 }
 
 void WebLayerTreeViewImpl::scheduleComposite()
 {
     m_client->scheduleComposite();
 }
 
 } // namespace WebKit