cc: Plumb gpu/sw image decode limits as layer tree settings.

cc/tiles/software_image_decode_controller_unittest.cc

 // Copyright 2015 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/software_image_decode_controller.h"
 
 #include "cc/playback/draw_image.h"
 #include "cc/raster/tile_task.h"
+#include "cc/resources/resource_format.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 
 namespace cc {
 namespace {
 
+size_t kLockedMemoryLimitBytes = 128 * 1024 * 1024;
+class TestSoftwareImageDecodeController : public SoftwareImageDecodeController {
+ public:
+  TestSoftwareImageDecodeController()
+      : SoftwareImageDecodeController(ResourceFormat::RGBA_8888,
+                                      kLockedMemoryLimitBytes) {}
+};
+
 sk_sp<SkImage> CreateImage(int width, int height) {
   SkBitmap bitmap;
   bitmap.allocPixels(SkImageInfo::MakeN32Premul(width, height));
   return SkImage::MakeFromBitmap(bitmap);
 }
 
 SkMatrix CreateMatrix(const SkSize& scale, bool is_decomposable) {
   SkMatrix matrix;
   matrix.setScale(scale.width(), scale.height());
 
@@ skipping 445 matching lines @@
   auto key = ImageDecodeControllerKey::FromDrawImage(draw_image);
   EXPECT_EQ(image->uniqueID(), key.image_id());
   EXPECT_EQ(kHigh_SkFilterQuality, key.filter_quality());
   EXPECT_EQ(40, key.target_size().width());
   EXPECT_EQ(35, key.target_size().height());
   EXPECT_EQ(gfx::Rect(20, 30, 80, 70), key.src_rect());
   EXPECT_EQ(40u * 35u * 4u, key.locked_bytes());
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetTaskForImageSameImage) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   sk_sp<SkImage> image = CreateImage(100, 100);
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(need_unref);
   EXPECT_TRUE(task);
 
   DrawImage another_draw_image(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> another_task;
   need_unref = controller.GetTaskForImageAndRef(
       another_draw_image, ImageDecodeController::TracingInfo(), &another_task);
   EXPECT_TRUE(need_unref);
   EXPECT_TRUE(task.get() == another_task.get());
 
   controller.UnrefImage(draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest,
      GetTaskForImageSameImageDifferentQuality) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   sk_sp<SkImage> image = CreateImage(100, 100);
   bool is_decomposable = true;
 
   DrawImage high_quality_draw_image(
       image, SkIRect::MakeWH(image->width(), image->height()),
       kHigh_SkFilterQuality,
       CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> high_quality_task;
   bool need_unref = controller.GetTaskForImageAndRef(
       high_quality_draw_image, ImageDecodeController::TracingInfo(),
@@ skipping 25 matching lines @@
   EXPECT_TRUE(low_quality_task);
   EXPECT_TRUE(high_quality_task.get() != low_quality_task.get());
   EXPECT_TRUE(medium_quality_task.get() != low_quality_task.get());
 
   controller.UnrefImage(high_quality_draw_image);
   controller.UnrefImage(medium_quality_draw_image);
   controller.UnrefImage(low_quality_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetTaskForImageSameImageDifferentSize) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   sk_sp<SkImage> image = CreateImage(100, 100);
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   DrawImage half_size_draw_image(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> half_size_task;
   bool need_unref = controller.GetTaskForImageAndRef(
       half_size_draw_image, ImageDecodeController::TracingInfo(),
@@ skipping 10 matching lines @@
       &quarter_size_task);
   EXPECT_TRUE(need_unref);
   EXPECT_TRUE(quarter_size_task);
   EXPECT_TRUE(half_size_task.get() != quarter_size_task.get());
 
   controller.UnrefImage(half_size_draw_image);
   controller.UnrefImage(quarter_size_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetTaskForImageDifferentImage) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> first_image = CreateImage(100, 100);
   DrawImage first_draw_image(
       first_image, SkIRect::MakeWH(first_image->width(), first_image->height()),
       quality, CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> first_task;
   bool need_unref = controller.GetTaskForImageAndRef(
       first_draw_image, ImageDecodeController::TracingInfo(), &first_task);
@@ skipping 10 matching lines @@
       second_draw_image, ImageDecodeController::TracingInfo(), &second_task);
   EXPECT_TRUE(need_unref);
   EXPECT_TRUE(second_task);
   EXPECT_TRUE(first_task.get() != second_task.get());
 
   controller.UnrefImage(first_draw_image);
   controller.UnrefImage(second_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetTaskForImageAlreadyDecoded) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
@@ skipping 13 matching lines @@
 
   task->WillComplete();
   task->CompleteOnOriginThread(nullptr);
   task->DidComplete();
 
   controller.UnrefImage(draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetTaskForImageAlreadyPrerolled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kLow_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(1.f, 1.f), is_decomposable));
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
@@ skipping 20 matching lines @@
       draw_image, ImageDecodeController::TracingInfo(), &third_task);
   EXPECT_TRUE(need_unref);
   EXPECT_FALSE(third_task);
 
   controller.UnrefImage(draw_image);
   controller.UnrefImage(draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetTaskForImageCanceledGetsNewTask) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
@@ skipping 25 matching lines @@
       draw_image, ImageDecodeController::TracingInfo(), &third_task);
   EXPECT_TRUE(need_unref);
   EXPECT_TRUE(third_task);
   EXPECT_FALSE(third_task.get() == task.get());
 
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest,
      GetTaskForImageCanceledWhileReffedGetsNewTask) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
@@ skipping 24 matching lines @@
   EXPECT_TRUE(third_task);
   EXPECT_FALSE(third_task.get() == task.get());
 
   // 3 Unrefs!
   controller.UnrefImage(draw_image);
   controller.UnrefImage(draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetDecodedImageForDraw) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
@@ skipping 20 matching lines @@
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_FALSE(decoded_draw_image.is_scale_adjustment_identity());
   EXPECT_FALSE(decoded_draw_image.is_at_raster_decode());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest,
      GetDecodedImageForDrawWithNonContainedSrcRect) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(
       image, SkIRect::MakeXYWH(20, 30, image->width(), image->height()),
       quality, CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
@@ skipping 19 matching lines @@
   EXPECT_FLOAT_EQ(0.5f, decoded_draw_image.scale_adjustment().height());
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_FALSE(decoded_draw_image.is_scale_adjustment_identity());
   EXPECT_FALSE(decoded_draw_image.is_at_raster_decode());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, GetDecodedImageForDrawAtRasterDecode) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   EXPECT_EQ(50, decoded_draw_image.image()->width());
   EXPECT_EQ(50, decoded_draw_image.image()->height());
   EXPECT_FLOAT_EQ(0.5f, decoded_draw_image.scale_adjustment().width());
   EXPECT_FLOAT_EQ(0.5f, decoded_draw_image.scale_adjustment().height());
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_FALSE(decoded_draw_image.is_scale_adjustment_identity());
   EXPECT_TRUE(decoded_draw_image.is_at_raster_decode());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest,
      GetDecodedImageForDrawAtRasterDecodeMultipleTimes) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
@@ skipping 10 matching lines @@
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_EQ(decoded_draw_image.image()->uniqueID(),
             another_decoded_draw_image.image()->uniqueID());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.DrawWithImageFinished(draw_image, another_decoded_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest,
      GetDecodedImageForDrawAtRasterDecodeDoesNotPreventTasks) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
@@ skipping 32 matching lines @@
             another_decoded_draw_image.image()->uniqueID());
   EXPECT_FALSE(another_decoded_draw_image.is_at_raster_decode());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.DrawWithImageFinished(draw_image, another_decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest,
      GetDecodedImageForDrawAtRasterDecodeIsUsedForLockedCache) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
@@ skipping 32 matching lines @@
   // raster time, since it's now in the locked cache.
   EXPECT_EQ(decoded_draw_image.image()->uniqueID(),
             another_decoded_draw_image.image()->uniqueID());
   EXPECT_FALSE(another_decoded_draw_image.is_at_raster_decode());
 
   controller.DrawWithImageFinished(draw_image, another_decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, ZeroSizedImagesAreSkipped) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.f, 0.f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_FALSE(task);
   EXPECT_FALSE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_FALSE(decoded_draw_image.image());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, NonOverlappingSrcRectImagesAreSkipped) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kHigh_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(
       image, SkIRect::MakeXYWH(150, 150, image->width(), image->height()),
       quality, CreateMatrix(SkSize::Make(1.f, 1.f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_FALSE(task);
   EXPECT_FALSE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_FALSE(decoded_draw_image.image());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, LowQualityFilterIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kLow_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(1.f, 1.f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImage object.
   EXPECT_TRUE(decoded_draw_image.image() != image);
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, LowQualityScaledSubrectIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kLow_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeXYWH(10, 10, 80, 80), quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImage object.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_TRUE(decoded_draw_image.is_scale_adjustment_identity());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, NoneQualityScaledSubrectIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kNone_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(100, 100);
   DrawImage draw_image(image, SkIRect::MakeXYWH(10, 10, 80, 80), quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImage object.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kNone_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_TRUE(decoded_draw_image.is_scale_adjustment_identity());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt01_5ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(1.5f, 1.5f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImageObject.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_EQ(500, decoded_draw_image.image()->width());
   EXPECT_EQ(200, decoded_draw_image.image()->height());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt1_0ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(1.f, 1.f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImageObject.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_EQ(500, decoded_draw_image.image()->width());
   EXPECT_EQ(200, decoded_draw_image.image()->height());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt0_75ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.75f, 0.75f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImageObject.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_EQ(500, decoded_draw_image.image()->width());
   EXPECT_EQ(200, decoded_draw_image.image()->height());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt0_5ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImageObject.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_EQ(250, decoded_draw_image.image()->width());
   EXPECT_EQ(100, decoded_draw_image.image()->height());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt0_49ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.49f, 0.49f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImageObject.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_EQ(250, decoded_draw_image.image()->width());
   EXPECT_EQ(100, decoded_draw_image.image()->height());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt0_1ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(image, SkIRect::MakeWH(image->width(), image->height()),
                        quality,
                        CreateMatrix(SkSize::Make(0.1f, 0.1f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImageObject.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_EQ(62, decoded_draw_image.image()->width());
   EXPECT_EQ(25, decoded_draw_image.image()->height());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt0_01ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.01f, 0.01f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_TRUE(task);
   EXPECT_TRUE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_TRUE(decoded_draw_image.image());
   // If we decoded the image and cached it, it would be stored in a different
   // SkImageObject.
   EXPECT_TRUE(decoded_draw_image.image() != image);
   EXPECT_EQ(kLow_SkFilterQuality, decoded_draw_image.filter_quality());
   EXPECT_EQ(7, decoded_draw_image.image()->width());
   EXPECT_EQ(3, decoded_draw_image.image()->height());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
   controller.UnrefImage(draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest, MediumQualityAt0_001ScaleIsHandled) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.001f, 0.001f), is_decomposable));
 
   scoped_refptr<TileTask> task;
   bool need_unref = controller.GetTaskForImageAndRef(
       draw_image, ImageDecodeController::TracingInfo(), &task);
   EXPECT_FALSE(task);
   EXPECT_FALSE(need_unref);
 
   DecodedDrawImage decoded_draw_image =
       controller.GetDecodedImageForDraw(draw_image);
   EXPECT_FALSE(decoded_draw_image.image());
 
   controller.DrawWithImageFinished(draw_image, decoded_draw_image);
 }
 
 TEST(SoftwareImageDecodeControllerTest,
      MediumQualityImagesAreTheSameAt0_5And0_49Scale) {
-  SoftwareImageDecodeController controller;
+  TestSoftwareImageDecodeController controller;
   bool is_decomposable = true;
   SkFilterQuality quality = kMedium_SkFilterQuality;
 
   sk_sp<SkImage> image = CreateImage(500, 200);
   DrawImage draw_image_50(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.5f, 0.5f), is_decomposable));
   DrawImage draw_image_49(
       image, SkIRect::MakeWH(image->width(), image->height()), quality,
       CreateMatrix(SkSize::Make(0.49f, 0.49f), is_decomposable));
@@ skipping 29 matching lines @@
   EXPECT_EQ(decoded_draw_image_50.image(), decoded_draw_image_49.image());
 
   controller.DrawWithImageFinished(draw_image_50, decoded_draw_image_50);
   controller.UnrefImage(draw_image_50);
   controller.DrawWithImageFinished(draw_image_49, decoded_draw_image_49);
   controller.UnrefImage(draw_image_49);
 }
 
 }  // namespace
 }  // namespace cc