cc: Make test BeginFrameArgs deadlines more realistic.

cc/test/begin_frame_args_test.cc

Index: cc/test/begin_frame_args_test.cc
diff --git a/cc/test/begin_frame_args_test.cc b/cc/test/begin_frame_args_test.cc
index c176a0e6ee877333bc6e20511b1b768ad72f58fd..63972854e81ae83e58b8abaf4705625abba8ec3c 100644
--- a/cc/test/begin_frame_args_test.cc
+++ b/cc/test/begin_frame_args_test.cc
@@ -19,7 +19,8 @@ BeginFrameArgs CreateBeginFrameArgsForTesting(
     base::TimeTicks frame_time) {
   return BeginFrameArgs::Create(
       location, frame_time,
-      frame_time + (BeginFrameArgs::DefaultInterval() / 2),
+      frame_time + BeginFrameArgs::DefaultInterval() -
+          BeginFrameArgs::DefaultEstimatedParentDrawTime(),
       BeginFrameArgs::DefaultInterval(), BeginFrameArgs::NORMAL);
 }
 
@@ -59,7 +60,8 @@ BeginFrameArgs CreateBeginFrameArgsForTesting(
     scoped_refptr<TestNowSource> now_src) {
   base::TimeTicks now = now_src->Now();
   return BeginFrameArgs::Create(
-      location, now, now + (BeginFrameArgs::DefaultInterval() / 2),
+      location, now, now + BeginFrameArgs::DefaultInterval() -
+                         BeginFrameArgs::DefaultEstimatedParentDrawTime(),
       BeginFrameArgs::DefaultInterval(), BeginFrameArgs::NORMAL);
 }