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 13496f5111deb31b70e8545030b60050498f67e6..75858d123032ea53ca9e6c3a0798baa2e1cf1d00 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(); }