Creating utility for converting TimeTicks to WebKit double and use it in the Chrome compositor.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 13198bae4bfde4c1ac33a53ef6234655c954b416..756c5d799e805958b86b177d27ff6775aa20d1dd 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -62,6 +62,7 @@
 #include "ui/gfx/frame_time.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/vector2d_conversions.h"
+#include "webkit/renderer/compositor_bindings/webkit_time.h"

[jamesr, 2014/03/11 20:09:54]

this is a bad dependency. the compositor bindings depend on cc, you can't have a
dependency the other way around or that would create a cycle

 
 namespace {
 
@@ -2650,7 +2651,7 @@ void LayerTreeHostImpl::AnimatePageScale(base::TimeTicks time) {
   if (!page_scale_animation_)
     return;
 
-  double monotonic_time = (time - base::TimeTicks()).InSecondsF();
+  double monotonic_time = webkit::ToWebKitMonotonicTime(time);
   gfx::Vector2dF scroll_total = active_tree_->TotalScrollOffset();
 
   if (!page_scale_animation_->IsAnimationStarted())
@@ -2698,14 +2699,13 @@ void LayerTreeHostImpl::AnimateLayers(base::TimeTicks monotonic_time,
   TRACE_EVENT0("cc", "LayerTreeHostImpl::AnimateLayers");
 
   last_animation_time_ = wall_clock_time;
-  double monotonic_seconds = (monotonic_time - base::TimeTicks()).InSecondsF();
 
   AnimationRegistrar::AnimationControllerMap copy =
       animation_registrar_->active_animation_controllers();
   for (AnimationRegistrar::AnimationControllerMap::iterator iter = copy.begin();
        iter != copy.end();
        ++iter)
-    (*iter).second->Animate(monotonic_seconds);
+    (*iter).second->Animate(webkit::ToWebKitMonotonicTime(monotonic_time));
 
   SetNeedsRedraw();
 }