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

cc/test/fake_content_layer_client.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/fake_content_layer_client.h"
 
 #include "cc/playback/clip_display_item.h"
 #include "cc/playback/display_item_list_settings.h"
 #include "cc/playback/drawing_display_item.h"
 #include "cc/playback/transform_display_item.h"
@@ skipping 19 matching lines @@
     : fill_with_nonsolid_color_(false),
       last_canvas_(nullptr),
       last_painting_control_(PAINTING_BEHAVIOR_NORMAL),
       reported_memory_usage_(0) {}
 
 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) {
     const gfx::RectF& draw_rect = it->first;
     const SkPaint& paint = it->second;
     canvas =
         skia::SharePtr(recorder.beginRecording(gfx::RectFToSkRect(draw_rect)));
     canvas->drawRect(gfx::RectFToSkRect(draw_rect), paint);
     picture = skia::AdoptRef(recorder.endRecordingAsPicture());
     auto* item = display_list->CreateAndAppendItem<DrawingDisplayItem>();
@@ skipping 12 matching lines @@
                       &it->paint);
     picture = skia::AdoptRef(recorder.endRecordingAsPicture());
     auto* item = display_list->CreateAndAppendItem<DrawingDisplayItem>();
     item->SetNew(picture.Pass());
     if (!it->transform.IsIdentity()) {
       display_list->CreateAndAppendItem<EndTransformDisplayItem>();
     }
   }
 
   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;
       paint.setColor(red ? SK_ColorRED : SK_ColorBLUE);
       canvas =
           skia::SharePtr(recorder.beginRecording(gfx::RectToSkRect(draw_rect)));
       canvas->drawIRect(gfx::RectToSkIRect(draw_rect), paint);
       picture = skia::AdoptRef(recorder.endRecordingAsPicture());
       auto* item = display_list->CreateAndAppendItem<DrawingDisplayItem>();
       item->SetNew(picture.Pass());
       draw_rect.Inset(1, 1);
     }
   }
 
   display_list->CreateAndAppendItem<EndClipDisplayItem>();
 
   display_list->Finalize();
   return display_list;
 }
 
 bool FakeContentLayerClient::FillsBoundsCompletely() const { return false; }
 
 size_t FakeContentLayerClient::GetApproximateUnsharedMemoryUsage() const {
   return reported_memory_usage_;
 }
 
 }  // namespace cc