Update base/timer.h code to pass through Location from call sites.

webkit/plugins/npapi/webplugin_delegate_impl_mac.mm

Index: webkit/plugins/npapi/webplugin_delegate_impl_mac.mm
diff --git a/webkit/plugins/npapi/webplugin_delegate_impl_mac.mm b/webkit/plugins/npapi/webplugin_delegate_impl_mac.mm
index a384e8ade5736150b48f59548cdc3ff42d9007c6..d680ca85b7f96583e544707594e0c7a2f38650c9 100644
--- a/webkit/plugins/npapi/webplugin_delegate_impl_mac.mm
+++ b/webkit/plugins/npapi/webplugin_delegate_impl_mac.mm
@@ -122,7 +122,8 @@ class CarbonIdleEventSource {
     // Adds |delegate| to this visibility group.
     void RegisterDelegate(WebPluginDelegateImpl* delegate) {
       if (delegates_.empty()) {
-        timer_.Start(base::TimeDelta::FromMilliseconds(timer_period_),
+        timer_.Start(FROM_HERE,
+                     base::TimeDelta::FromMilliseconds(timer_period_),
                      this, &VisibilityGroup::SendIdleEvents);
       }
       delegates_.insert(delegate);
@@ -1027,7 +1028,7 @@ void WebPluginDelegateImpl::PluginVisibilityChanged() {
   if (instance()->drawing_model() == NPDrawingModelCoreAnimation) {
     bool plugin_visible = container_is_visible_ && !clip_rect_.IsEmpty();
     if (plugin_visible && !redraw_timer_->IsRunning() && windowed_handle()) {
-      redraw_timer_->Start(
+      redraw_timer_->Start(FROM_HERE,
           base::TimeDelta::FromMilliseconds(kCoreAnimationRedrawPeriodMs),
           this, &WebPluginDelegateImpl::DrawLayerInSurface);
     } else if (!plugin_visible) {