cc/blink: Veto checker-imaging for multipart image resources.

cc/tiles/checker_image_tracker_unittest.cc

 // Copyright 2017 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/tiles/checker_image_tracker.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 75 matching lines @@
     checker_image_tracker_ = base::MakeUnique<CheckerImageTracker>(
         &image_controller_, this, checker_images_enabled);
   }
 
   void TearDown() override { checker_image_tracker_.reset(); }
 
   DrawImage CreateImage(
       ImageType image_type,
       PaintImage::AnimationType animation = PaintImage::AnimationType::STATIC,
       PaintImage::CompletionState completion =
-          PaintImage::CompletionState::DONE) {
+          PaintImage::CompletionState::DONE,
+      bool is_multipart = false) {
     int dimension = 0;
     switch (image_type) {
       case ImageType::CHECKERABLE:
         dimension = kCheckerableImageDimension;
         break;
       case ImageType::SMALL_NON_CHECKERABLE:
         dimension = kSmallNonCheckerableImageDimension;
         break;
       case ImageType::LARGE_NON_CHECKERABLE:
         dimension = kLargeNonCheckerableImageDimension;
         break;
     }
 
     sk_sp<SkImage> image =
         CreateDiscardableImage(gfx::Size(dimension, dimension));
-    return DrawImage(
-        PaintImage(PaintImage::GetNextId(), image, animation, completion),
-        SkIRect::MakeWH(dimension, dimension), kNone_SkFilterQuality,
-        SkMatrix::I(), gfx::ColorSpace());
+    return DrawImage(PaintImage(PaintImage::GetNextId(), image, animation,
+                                completion, 1, is_multipart),
+                     SkIRect::MakeWH(dimension, dimension),
+                     kNone_SkFilterQuality, SkMatrix::I(), gfx::ColorSpace());
   }
 
   CheckerImageTracker::ImageDecodeQueue BuildImageDecodeQueue(
       std::vector<DrawImage> images,
       WhichTree tree) {
     CheckerImageTracker::ImageDecodeQueue decode_queue;
     for (const auto& image : images) {
       if (checker_image_tracker_->ShouldCheckerImage(image, tree))
         decode_queue.push_back(image.paint_image());
     }
@@ skipping 338 matching lines @@
   CheckerImageTracker::ImageDecodeQueue image_decode_queue =
       BuildImageDecodeQueue(draw_images, WhichTree::PENDING_TREE);
   checker_image_tracker_->ScheduleImageDecodeQueue(image_decode_queue);
   EXPECT_EQ(image_controller_.decoded_images().size(), 1u);
   EXPECT_EQ(image_controller_.decoded_images()[0].scale(),
             SkSize::Make(1.8f, 1.8f));
   EXPECT_EQ(image_controller_.decoded_images()[0].filter_quality(),
             kHigh_SkFilterQuality);
 }
 
+TEST_F(CheckerImageTrackerTest, DontCheckerMultiPartImages) {
+  SetUpTracker(true);
+
+  DrawImage image = CreateImage(ImageType::CHECKERABLE);
+  EXPECT_FALSE(image.paint_image().is_multipart());
+  DrawImage multi_part_image =
+      CreateImage(ImageType::CHECKERABLE, PaintImage::AnimationType::STATIC,
+                  PaintImage::CompletionState::DONE, true);
+  EXPECT_TRUE(multi_part_image.paint_image().is_multipart());
+
+  EXPECT_TRUE(checker_image_tracker_->ShouldCheckerImage(
+      image, WhichTree::PENDING_TREE));
+  EXPECT_FALSE(checker_image_tracker_->ShouldCheckerImage(
+      multi_part_image, WhichTree::PENDING_TREE));
+}
+
 }  // namespace
 }  // namespace cc