Turn off computation of the interest rect in cc in synchronized paint mode.

cc/trees/layer_tree_host_unittest_occlusion.cc

Index: cc/trees/layer_tree_host_unittest_occlusion.cc
diff --git a/cc/trees/layer_tree_host_unittest_occlusion.cc b/cc/trees/layer_tree_host_unittest_occlusion.cc
index 37c56d1e74a2a33bf1ae940af27a49e9b9e1d156..a73150cef2cd63f6a5cc2021a8fb68fe7ff218d7 100644
--- a/cc/trees/layer_tree_host_unittest_occlusion.cc
+++ b/cc/trees/layer_tree_host_unittest_occlusion.cc
@@ -159,6 +159,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnMask
 
     layer_tree_host()->SetRootLayer(root);
     LayerTreeTest::SetupTree();
+    client_.set_bounds(root->bounds());
   }
 
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
@@ -231,6 +232,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesInsideReplica
 
     layer_tree_host()->SetRootLayer(root);
     LayerTreeTest::SetupTree();
+    client_.set_bounds(root->bounds());
   }
 
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }