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

cc/test/fake_content_layer_client.cc

Index: cc/test/fake_content_layer_client.cc
diff --git a/cc/test/fake_content_layer_client.cc b/cc/test/fake_content_layer_client.cc
index bfa7c19b36ab6ff22683d1ef01a30aa21400a326..97bbe7a64316dc1f58bad5a6f55e4d5944e5e7a4 100644
--- a/cc/test/fake_content_layer_client.cc
+++ b/cc/test/fake_content_layer_client.cc
@@ -37,19 +37,19 @@ FakeContentLayerClient::~FakeContentLayerClient() {
 
 scoped_refptr<DisplayItemList>
 FakeContentLayerClient::PaintContentsToDisplayList(
-    const gfx::Rect& clip,
-    PaintingControlSetting painting_control) {
+    PaintingControlSetting painting_control,
+    gfx::Rect* recording_viewport) {
   // Cached picture is used because unit tests expect to be able to
   // use GatherPixelRefs.
   DisplayItemListSettings settings;
   settings.use_cached_picture = true;
   scoped_refptr<DisplayItemList> display_list =
-      DisplayItemList::Create(clip, settings);
+      DisplayItemList::Create(*recording_viewport, settings);
   SkPictureRecorder recorder;
   skia::RefPtr<SkCanvas> canvas;
   skia::RefPtr<SkPicture> picture;
   auto* item = display_list->CreateAndAppendItem<ClipDisplayItem>();
-  item->SetNew(clip, std::vector<SkRRect>());
+  item->SetNew(*recording_viewport, std::vector<SkRRect>());
 
   for (RectPaintVector::const_iterator it = draw_rects_.begin();
        it != draw_rects_.end(); ++it) {
@@ -82,7 +82,7 @@ FakeContentLayerClient::PaintContentsToDisplayList(
   }
 
   if (fill_with_nonsolid_color_) {
-    gfx::Rect draw_rect = clip;
+    gfx::Rect draw_rect = *recording_viewport;
     bool red = true;
     while (!draw_rect.IsEmpty()) {
       SkPaint paint;