[cc] Store CCLayerImpls as scoped_ptrs

cc/CCDamageTrackerTest.cpp

 // Copyright 2011 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 "config.h"
 
 #include "CCDamageTracker.h"
 
 #include "CCGeometryTestUtils.h"
 #include "CCLayerImpl.h"
@@ skipping 48 matching lines @@
 
     // Iterate back-to-front, so that damage correctly propagates from descendant surfaces to ancestors.
     for (int i = renderSurfaceLayerList.size() - 1; i >= 0; --i) {
         CCRenderSurface* targetSurface = renderSurfaceLayerList[i]->renderSurface();
         targetSurface->damageTracker()->updateDamageTrackingState(targetSurface->layerList(), targetSurface->owningLayerId(), targetSurface->surfacePropertyChangedOnlyFromDescendant(), targetSurface->contentRect(), renderSurfaceLayerList[i]->maskLayer(), renderSurfaceLayerList[i]->filters());
     }
 
     root->resetAllChangeTrackingForSubtree();
 }
 
-PassOwnPtr<CCLayerImpl> createTestTreeWithOneSurface()
+scoped_ptr<CCLayerImpl> createTestTreeWithOneSurface()
 {
-    OwnPtr<CCLayerImpl> root = CCLayerImpl::create(1);
-    OwnPtr<CCLayerImpl> child = CCLayerImpl::create(2);
+    scoped_ptr<CCLayerImpl> root = CCLayerImpl::create(1);
+    scoped_ptr<CCLayerImpl> child = CCLayerImpl::create(2);
 
     root->setPosition(FloatPoint::zero());
     root->setAnchorPoint(FloatPoint::zero());
     root->setBounds(IntSize(500, 500));
     root->setContentBounds(IntSize(500, 500));
     root->setDrawsContent(true);
     root->createRenderSurface();
     root->renderSurface()->setContentRect(IntRect(IntPoint(), IntSize(500, 500)));
 
     child->setPosition(FloatPoint(100, 100));
     child->setAnchorPoint(FloatPoint::zero());
     child->setBounds(IntSize(30, 30));
     child->setContentBounds(IntSize(30, 30));
     child->setDrawsContent(true);
-    root->addChild(child.release());
+    root->addChild(child.Pass());
 
-    return root.release();
+    return root.Pass();
 }
 
-PassOwnPtr<CCLayerImpl> createTestTreeWithTwoSurfaces()
+scoped_ptr<CCLayerImpl> createTestTreeWithTwoSurfaces()
 {
     // This test tree has two render surfaces: one for the root, and one for
     // child1. Additionally, the root has a second child layer, and child1 has two
     // children of its own.
 
-    OwnPtr<CCLayerImpl> root = CCLayerImpl::create(1);
-    OwnPtr<CCLayerImpl> child1 = CCLayerImpl::create(2);
-    OwnPtr<CCLayerImpl> child2 = CCLayerImpl::create(3);
-    OwnPtr<CCLayerImpl> grandChild1 = CCLayerImpl::create(4);
-    OwnPtr<CCLayerImpl> grandChild2 = CCLayerImpl::create(5);
+    scoped_ptr<CCLayerImpl> root = CCLayerImpl::create(1);
+    scoped_ptr<CCLayerImpl> child1 = CCLayerImpl::create(2);
+    scoped_ptr<CCLayerImpl> child2 = CCLayerImpl::create(3);
+    scoped_ptr<CCLayerImpl> grandChild1 = CCLayerImpl::create(4);
+    scoped_ptr<CCLayerImpl> grandChild2 = CCLayerImpl::create(5);
 
     root->setPosition(FloatPoint::zero());
     root->setAnchorPoint(FloatPoint::zero());
     root->setBounds(IntSize(500, 500));
     root->setContentBounds(IntSize(500, 500));
     root->setDrawsContent(true);
     root->createRenderSurface();
     root->renderSurface()->setContentRect(IntRect(IntPoint(), IntSize(500, 500)));
 
     child1->setPosition(FloatPoint(100, 100));
@@ skipping 14 matching lines @@
     grandChild1->setBounds(IntSize(6, 8));
     grandChild1->setContentBounds(IntSize(6, 8));
     grandChild1->setDrawsContent(true);
 
     grandChild2->setPosition(FloatPoint(190, 190));
     grandChild2->setAnchorPoint(FloatPoint::zero());
     grandChild2->setBounds(IntSize(6, 8));
     grandChild2->setContentBounds(IntSize(6, 8));
     grandChild2->setDrawsContent(true);
 
-    child1->addChild(grandChild1.release());
-    child1->addChild(grandChild2.release());
-    root->addChild(child1.release());
-    root->addChild(child2.release());
+    child1->addChild(grandChild1.Pass());
+    child1->addChild(grandChild2.Pass());
+    root->addChild(child1.Pass());
+    root->addChild(child2.Pass());
 
-    return root.release();
+    return root.Pass();
 }
 
-PassOwnPtr<CCLayerImpl> createAndSetUpTestTreeWithOneSurface()
+scoped_ptr<CCLayerImpl> createAndSetUpTestTreeWithOneSurface()
 {
-    OwnPtr<CCLayerImpl> root = createTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createTestTreeWithOneSurface();
 
     // Setup includes going past the first frame which always damages everything, so
     // that we can actually perform specific tests.
     emulateDrawingOneFrame(root.get());
 
-    return root.release();
+    return root.Pass();
 }
 
-PassOwnPtr<CCLayerImpl> createAndSetUpTestTreeWithTwoSurfaces()
+scoped_ptr<CCLayerImpl> createAndSetUpTestTreeWithTwoSurfaces()
 {
-    OwnPtr<CCLayerImpl> root = createTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createTestTreeWithTwoSurfaces();
 
     // Setup includes going past the first frame which always damages everything, so
     // that we can actually perform specific tests.
     emulateDrawingOneFrame(root.get());
 
-    return root.release();
+    return root.Pass();
 }
 
 class CCDamageTrackerTest : public testing::Test {
 private:
     // For testing purposes, fake that we are on the impl thread.
     DebugScopedSetImplThread setImplThread;
 };
 
 TEST_F(CCDamageTrackerTest, sanityCheckTestTreeWithOneSurface)
 {
     // Sanity check that the simple test tree will actually produce the expected render
     // surfaces and layer lists.
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
 
     EXPECT_EQ(2u, root->renderSurface()->layerList().size());
     EXPECT_EQ(1, root->renderSurface()->layerList()[0]->id());
     EXPECT_EQ(2, root->renderSurface()->layerList()[1]->id());
 
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(0, 0, 500, 500), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, sanityCheckTestTreeWithTwoSurfaces)
 {
     // Sanity check that the complex test tree will actually produce the expected render
     // surfaces and layer lists.
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
 
     CCLayerImpl* child1 = root->children()[0];
     CCLayerImpl* child2 = root->children()[1];
     FloatRect childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
 
     ASSERT_TRUE(child1->renderSurface());
     EXPECT_FALSE(child2->renderSurface());
     EXPECT_EQ(3u, root->renderSurface()->layerList().size());
     EXPECT_EQ(2u, child1->renderSurface()->layerList().size());
 
     // The render surface for child1 only has a contentRect that encloses grandChild1 and grandChild2, because child1 does not draw content.
     EXPECT_FLOAT_RECT_EQ(FloatRect(190, 190, 16, 18), childDamageRect);
     EXPECT_FLOAT_RECT_EQ(FloatRect(0, 0, 500, 500), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForUpdateRects)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     // CASE 1: Setting the update rect should cause the corresponding damage to the surface.
     //
     clearDamageForAllSurfaces(root.get());
     child->setUpdateRect(FloatRect(10, 11, 12, 13));
     emulateDrawingOneFrame(root.get());
 
     // Damage position on the surface should be: position of updateRect (10, 11) relative to the child (100, 100).
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
@@ skipping 13 matching lines @@
     child->setUpdateRect(FloatRect(20, 25, 1, 2));
     emulateDrawingOneFrame(root.get());
 
     // Damage position on the surface should be: position of updateRect (20, 25) relative to the child (100, 100).
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(120, 125, 1, 2), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForPropertyChanges)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     // CASE 1: The layer's property changed flag takes priority over update rect.
     //
     clearDamageForAllSurfaces(root.get());
     child->setUpdateRect(FloatRect(10, 11, 12, 13));
     child->setOpacity(0.5);
     emulateDrawingOneFrame(root.get());
 
     // Sanity check - we should not have accidentally created a separate render surface for the translucent layer.
@@ skipping 23 matching lines @@
     expectedRect.uniteIfNonZero(FloatRect(200, 230, 30, 30));
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(expectedRect, rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForTransformedLayer)
 {
     // If a layer is transformed, the damage rect should still enclose the entire
     // transformed layer.
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     WebTransformationMatrix rotation;
     rotation.rotate(45);
 
     clearDamageForAllSurfaces(root.get());
     child->setAnchorPoint(FloatPoint(0.5, 0.5));
     child->setPosition(FloatPoint(85, 85));
     emulateDrawingOneFrame(root.get());
 
@@ skipping 22 matching lines @@
     // If a layer has a perspective transform that causes w < 0, then not clipping the
     // layer can cause an invalid damage rect. This test checks that the w < 0 case is
     // tracked properly.
     //
     // The transform is constructed so that if w < 0 clipping is not performed, the
     // incorrect rect will be very small, specifically: position (500.972504, 498.544617) and size 0.056610 x 2.910767.
     // Instead, the correctly transformed rect should actually be very huge (i.e. in theory, -infinity on the left),
     // and positioned so that the right-most bound rect will be approximately 501 units in root surface space.
     //
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     WebTransformationMatrix transform;
     transform.translate3d(500, 500, 0);
     transform.applyPerspective(1);
     transform.rotate3d(0, 45, 0);
     transform.translate3d(-50, -50, 0);
 
     // Set up the child
     child->setPosition(FloatPoint(0, 0));
@@ skipping 16 matching lines @@
 
     // The expected damage should cover the entire root surface (500x500), but we don't
     // care whether the damage rect was clamped or is larger than the surface for this test.
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     FloatRect damageWeCareAbout = FloatRect(FloatPoint::zero(), FloatSize(500, 500));
     EXPECT_TRUE(rootDamageRect.contains(damageWeCareAbout));
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForBlurredSurface)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     WebFilterOperations filters;
     filters.append(WebFilterOperation::createBlurFilter(5));
     int outsetTop, outsetRight, outsetBottom, outsetLeft;
     filters.getOutsets(outsetTop, outsetRight, outsetBottom, outsetLeft);
 
     // Setting the filter will damage the whole surface.
     clearDamageForAllSurfaces(root.get());
     root->setFilters(filters);
     emulateDrawingOneFrame(root.get());
 
     // Setting the update rect should cause the corresponding damage to the surface, blurred based on the size of the blur filter.
     clearDamageForAllSurfaces(root.get());
     child->setUpdateRect(FloatRect(10, 11, 12, 13));
     emulateDrawingOneFrame(root.get());
 
     // Damage position on the surface should be: position of updateRect (10, 11) relative to the child (100, 100), but expanded by the blur outsets.
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     FloatRect expectedDamageRect = FloatRect(110, 111, 12, 13);
     expectedDamageRect.move(-outsetLeft, -outsetTop);
     expectedDamageRect.expand(outsetLeft + outsetRight, outsetTop + outsetBottom);
     EXPECT_FLOAT_RECT_EQ(expectedDamageRect, rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForBackgroundBlurredChild)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     CCLayerImpl* child2 = root->children()[1];
 
     // Allow us to set damage on child1 too.
     child1->setDrawsContent(true);
 
     WebFilterOperations filters;
     filters.append(WebFilterOperation::createBlurFilter(2));
     int outsetTop, outsetRight, outsetBottom, outsetLeft;
     filters.getOutsets(outsetTop, outsetRight, outsetBottom, outsetLeft);
@@ skipping 82 matching lines @@
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     // Damage on child1 should be: position of updateRect offset by the child's position (100, 100), and expanded by the damage.
     expectedDamageRect = FloatRect(100, 100, 1, 1);
     expectedDamageRect.move(-outsetLeft, -outsetTop);
     expectedDamageRect.expand(outsetLeft + outsetRight, outsetTop + outsetBottom);
     EXPECT_FLOAT_RECT_EQ(expectedDamageRect, rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForAddingAndRemovingLayer)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child1 = root->children()[0];
 
     // CASE 1: Adding a new layer should cause the appropriate damage.
     //
     clearDamageForAllSurfaces(root.get());
     {
-        OwnPtr<CCLayerImpl> child2 = CCLayerImpl::create(3);
+        scoped_ptr<CCLayerImpl> child2 = CCLayerImpl::create(3);
         child2->setPosition(FloatPoint(400, 380));
         child2->setAnchorPoint(FloatPoint::zero());
         child2->setBounds(IntSize(6, 8));
         child2->setContentBounds(IntSize(6, 8));
         child2->setDrawsContent(true);
-        root->addChild(child2.release());
+        root->addChild(child2.Pass());
     }
     emulateDrawingOneFrame(root.get());
 
     // Sanity check - all 3 layers should be on the same render surface; render surfaces are tested elsewhere.
     ASSERT_EQ(3u, root->renderSurface()->layerList().size());
 
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(400, 380, 6, 8), rootDamageRect);
 
     // CASE 2: If the layer is removed, its entire old layer becomes exposed, not just the
     //         last update rect.
 
     // Advance one frame without damage so that we know the damage rect is not leftover from the previous case.
     clearDamageForAllSurfaces(root.get());
     emulateDrawingOneFrame(root.get());
     EXPECT_TRUE(root->renderSurface()->damageTracker()->currentDamageRect().isEmpty());
 
     // Then, test removing child1.
     child1->removeFromParent();
     emulateDrawingOneFrame(root.get());
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(100, 100, 30, 30), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForNewUnchangedLayer)
 {
     // If child2 is added to the layer tree, but it doesn't have any explicit damage of
     // its own, it should still indeed damage the target surface.
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
 
     clearDamageForAllSurfaces(root.get());
     {
-        OwnPtr<CCLayerImpl> child2 = CCLayerImpl::create(3);
+        scoped_ptr<CCLayerImpl> child2 = CCLayerImpl::create(3);
         child2->setPosition(FloatPoint(400, 380));
         child2->setAnchorPoint(FloatPoint::zero());
         child2->setBounds(IntSize(6, 8));
         child2->setContentBounds(IntSize(6, 8));
         child2->setDrawsContent(true);
         child2->resetAllChangeTrackingForSubtree();
         // Sanity check the initial conditions of the test, if these asserts trigger, it
         // means the test no longer actually covers the intended scenario.
         ASSERT_FALSE(child2->layerPropertyChanged());
         ASSERT_TRUE(child2->updateRect().isEmpty());
-        root->addChild(child2.release());
+        root->addChild(child2.Pass());
     }
     emulateDrawingOneFrame(root.get());
 
     // Sanity check - all 3 layers should be on the same render surface; render surfaces are tested elsewhere.
     ASSERT_EQ(3u, root->renderSurface()->layerList().size());
 
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(400, 380, 6, 8), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForMultipleLayers)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child1 = root->children()[0];
 
     // In this test we don't want the above tree manipulation to be considered part of the same frame.
     clearDamageForAllSurfaces(root.get());
     {
-        OwnPtr<CCLayerImpl> child2 = CCLayerImpl::create(3);
+        scoped_ptr<CCLayerImpl> child2 = CCLayerImpl::create(3);
         child2->setPosition(FloatPoint(400, 380));
         child2->setAnchorPoint(FloatPoint::zero());
         child2->setBounds(IntSize(6, 8));
         child2->setContentBounds(IntSize(6, 8));
         child2->setDrawsContent(true);
-        root->addChild(child2.release());
+        root->addChild(child2.Pass());
     }
     CCLayerImpl* child2 = root->children()[1];
     emulateDrawingOneFrame(root.get());
 
     // Damaging two layers simultaneously should cause combined damage.
     // - child1 update rect in surface space: FloatRect(100, 100, 1, 2);
     // - child2 update rect in surface space: FloatRect(400, 380, 3, 4);
     clearDamageForAllSurfaces(root.get());
     child1->setUpdateRect(FloatRect(0, 0, 1, 2));
     child2->setUpdateRect(FloatRect(0, 0, 3, 4));
     emulateDrawingOneFrame(root.get());
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(100, 100, 303, 284), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForNestedSurfaces)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     CCLayerImpl* child2 = root->children()[1];
     CCLayerImpl* grandChild1 = root->children()[0]->children()[0];
     FloatRect childDamageRect;
     FloatRect rootDamageRect;
 
     // CASE 1: Damage to a descendant surface should propagate properly to ancestor surface.
     //
     clearDamageForAllSurfaces(root.get());
     grandChild1->setOpacity(0.5);
@@ skipping 18 matching lines @@
 
 TEST_F(CCDamageTrackerTest, verifyDamageForSurfaceChangeFromDescendantLayer)
 {
     // If descendant layer changes and affects the content bounds of the render surface,
     // then the entire descendant surface should be damaged, and it should damage its
     // ancestor surface with the old and new surface regions.
 
     // This is a tricky case, since only the first grandChild changes, but the entire
     // surface should be marked dirty.
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     CCLayerImpl* grandChild1 = root->children()[0]->children()[0];
     FloatRect childDamageRect;
     FloatRect rootDamageRect;
 
     clearDamageForAllSurfaces(root.get());
     grandChild1->setPosition(FloatPoint(195, 205));
     emulateDrawingOneFrame(root.get());
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
@@ skipping 12 matching lines @@
     // surface. Note that in this case, the layerPropertyChanged flag already propagates
     // to the subtree (tested in CCLayerImpltest), which damages the entire child1
     // surface, but the damage tracker still needs the correct logic to compute the
     // exposed region on the root surface.
 
     // FIXME: the expectations of this test case should change when we add support for a
     //        unique scissorRect per renderSurface. In that case, the child1 surface
     //        should be completely unchanged, since we are only transforming it, while the
     //        root surface would be damaged appropriately.
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     FloatRect childDamageRect;
     FloatRect rootDamageRect;
 
     clearDamageForAllSurfaces(root.get());
     child1->setPosition(FloatPoint(50, 50));
     emulateDrawingOneFrame(root.get());
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
 
     // The new surface bounds should be damaged entirely.
     EXPECT_FLOAT_RECT_EQ(FloatRect(190, 190, 16, 18), childDamageRect);
 
     // The entire child1 surface and the old exposed child1 surface should damage the root surface.
     //  - old child1 surface in target space: FloatRect(290, 290, 16, 18)
     //  - new child1 surface in target space: FloatRect(240, 240, 16, 18)
     EXPECT_FLOAT_RECT_EQ(FloatRect(240, 240, 66, 68), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForAddingAndRemovingRenderSurfaces)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     FloatRect childDamageRect;
     FloatRect rootDamageRect;
 
     // CASE 1: If a descendant surface disappears, its entire old area becomes exposed.
     //
     clearDamageForAllSurfaces(root.get());
     child1->setOpacity(1);
     emulateDrawingOneFrame(root.get());
 
@@ skipping 23 matching lines @@
     EXPECT_EQ(2u, child1->renderSurface()->layerList().size());
 
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(190, 190, 16, 18), childDamageRect);
     EXPECT_FLOAT_RECT_EQ(FloatRect(290, 290, 16, 18), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyNoDamageWhenNothingChanged)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     FloatRect childDamageRect;
     FloatRect rootDamageRect;
 
     // CASE 1: If nothing changes, the damage rect should be empty.
     //
     clearDamageForAllSurfaces(root.get());
     emulateDrawingOneFrame(root.get());
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(childDamageRect.isEmpty());
     EXPECT_TRUE(rootDamageRect.isEmpty());
 
     // CASE 2: If nothing changes twice in a row, the damage rect should still be empty.
     //
     clearDamageForAllSurfaces(root.get());
     emulateDrawingOneFrame(root.get());
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(childDamageRect.isEmpty());
     EXPECT_TRUE(rootDamageRect.isEmpty());
 }
 
 TEST_F(CCDamageTrackerTest, verifyNoDamageForUpdateRectThatDoesNotDrawContent)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     FloatRect childDamageRect;
     FloatRect rootDamageRect;
 
     // In our specific tree, the update rect of child1 should not cause any damage to any
     // surface because it does not actually draw content.
     clearDamageForAllSurfaces(root.get());
     child1->setUpdateRect(FloatRect(0, 0, 1, 2));
     emulateDrawingOneFrame(root.get());
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(childDamageRect.isEmpty());
     EXPECT_TRUE(rootDamageRect.isEmpty());
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForReplica)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     CCLayerImpl* grandChild1 = child1->children()[0];
     CCLayerImpl* grandChild2 = child1->children()[1];
 
     // Damage on a surface that has a reflection should cause the target surface to
     // receive the surface's damage and the surface's reflected damage.
 
     // For this test case, we modify grandChild2, and add grandChild3 to extend the bounds
     // of child1's surface. This way, we can test reflection changes without changing
     // contentBounds of the surface.
     grandChild2->setPosition(FloatPoint(180, 180));
     {
-        OwnPtr<CCLayerImpl> grandChild3 = CCLayerImpl::create(6);
+        scoped_ptr<CCLayerImpl> grandChild3 = CCLayerImpl::create(6);
         grandChild3->setPosition(FloatPoint(240, 240));
         grandChild3->setAnchorPoint(FloatPoint::zero());
         grandChild3->setBounds(IntSize(10, 10));
         grandChild3->setContentBounds(IntSize(10, 10));
         grandChild3->setDrawsContent(true);
-        child1->addChild(grandChild3.release());
+        child1->addChild(grandChild3.Pass());
     }
     child1->setOpacity(0.5);
     emulateDrawingOneFrame(root.get());
 
     // CASE 1: adding a reflection about the left edge of grandChild1.
     //
     clearDamageForAllSurfaces(root.get());
     {
-        OwnPtr<CCLayerImpl> grandChild1Replica = CCLayerImpl::create(7);
+        scoped_ptr<CCLayerImpl> grandChild1Replica = CCLayerImpl::create(7);
         grandChild1Replica->setPosition(FloatPoint::zero());
         grandChild1Replica->setAnchorPoint(FloatPoint::zero());
         WebTransformationMatrix reflection;
         reflection.scale3d(-1, 1, 1);
         grandChild1Replica->setTransform(reflection);
-        grandChild1->setReplicaLayer(grandChild1Replica.release());
+        grandChild1->setReplicaLayer(grandChild1Replica.Pass());
     }
     emulateDrawingOneFrame(root.get());
 
     FloatRect grandChildDamageRect = grandChild1->renderSurface()->damageTracker()->currentDamageRect();
     FloatRect childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
 
     // The grandChild surface damage should not include its own replica. The child
     // surface damage should include the normal and replica surfaces.
     EXPECT_FLOAT_RECT_EQ(FloatRect(0, 0, 6, 8), grandChildDamageRect);
@@ skipping 16 matching lines @@
     // The child surface damage should include normal and replica surfaces for both old and new locations.
     //  - old location in target space: FloatRect(194, 200, 12, 8)
     //  - new location in target space: FloatRect(189, 205, 12, 8)
     EXPECT_FLOAT_RECT_EQ(FloatRect(0, 0, 6, 8), grandChildDamageRect);
     EXPECT_FLOAT_RECT_EQ(FloatRect(189, 200, 17, 13), childDamageRect);
     EXPECT_FLOAT_RECT_EQ(FloatRect(289, 300, 17, 13), rootDamageRect);
 
     // CASE 3: removing the reflection should cause the entire region including reflection
     //         to damage the target surface.
     clearDamageForAllSurfaces(root.get());
-    grandChild1->setReplicaLayer(nullptr);
+    grandChild1->setReplicaLayer(scoped_ptr<CCLayerImpl>());
     emulateDrawingOneFrame(root.get());
     ASSERT_EQ(oldContentRect.width(), child1->renderSurface()->contentRect().width());
     ASSERT_EQ(oldContentRect.height(), child1->renderSurface()->contentRect().height());
 
     EXPECT_FALSE(grandChild1->renderSurface());
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
 
     EXPECT_FLOAT_RECT_EQ(FloatRect(189, 205, 12, 8), childDamageRect);
     EXPECT_FLOAT_RECT_EQ(FloatRect(289, 305, 12, 8), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForMask)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     // In the current implementation of the damage tracker, changes to mask layers should
     // damage the entire corresponding surface.
 
     clearDamageForAllSurfaces(root.get());
 
     // Set up the mask layer.
     {
-        OwnPtr<CCLayerImpl> maskLayer = CCLayerImpl::create(3);
+        scoped_ptr<CCLayerImpl> maskLayer = CCLayerImpl::create(3);
         maskLayer->setPosition(child->position());
         maskLayer->setAnchorPoint(FloatPoint::zero());
         maskLayer->setBounds(child->bounds());
         maskLayer->setContentBounds(child->bounds());
-        child->setMaskLayer(maskLayer.release());
+        child->setMaskLayer(maskLayer.Pass());
     }
     CCLayerImpl* maskLayer = child->maskLayer();
 
     // Add opacity and a grandChild so that the render surface persists even after we remove the mask.
     child->setOpacity(0.5);
     {
-        OwnPtr<CCLayerImpl> grandChild = CCLayerImpl::create(4);
+        scoped_ptr<CCLayerImpl> grandChild = CCLayerImpl::create(4);
         grandChild->setPosition(FloatPoint(2, 2));
         grandChild->setAnchorPoint(FloatPoint::zero());
         grandChild->setBounds(IntSize(2, 2));
         grandChild->setContentBounds(IntSize(2, 2));
         grandChild->setDrawsContent(true);
-        child->addChild(grandChild.release());
+        child->addChild(grandChild.Pass());
     }
     emulateDrawingOneFrame(root.get());
 
     // Sanity check that a new surface was created for the child.
     ASSERT_TRUE(child->renderSurface());
 
     // CASE 1: the updateRect on a mask layer should damage the entire target surface.
     //
     clearDamageForAllSurfaces(root.get());
     maskLayer->setUpdateRect(FloatRect(1, 2, 3, 4));
@@ skipping 22 matching lines @@
     //
 
     // Advance one frame without damage so that we know the damage rect is not leftover from the previous case.
     clearDamageForAllSurfaces(root.get());
     emulateDrawingOneFrame(root.get());
     childDamageRect = child->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(childDamageRect.isEmpty());
 
     // Then test mask removal.
     clearDamageForAllSurfaces(root.get());
-    child->setMaskLayer(nullptr);
+    child->setMaskLayer(scoped_ptr<CCLayerImpl>());
     ASSERT_TRUE(child->layerPropertyChanged());
     emulateDrawingOneFrame(root.get());
 
     // Sanity check that a render surface still exists.
     ASSERT_TRUE(child->renderSurface());
 
     childDamageRect = child->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(0, 0, 30, 30), childDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForReplicaMask)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     CCLayerImpl* grandChild1 = child1->children()[0];
 
     // Changes to a replica's mask should not damage the original surface, because it is
     // not masked. But it does damage the ancestor target surface.
 
     clearDamageForAllSurfaces(root.get());
 
     // Create a reflection about the left edge of grandChild1.
     {
-        OwnPtr<CCLayerImpl> grandChild1Replica = CCLayerImpl::create(6);
+        scoped_ptr<CCLayerImpl> grandChild1Replica = CCLayerImpl::create(6);
         grandChild1Replica->setPosition(FloatPoint::zero());
         grandChild1Replica->setAnchorPoint(FloatPoint::zero());
         WebTransformationMatrix reflection;
         reflection.scale3d(-1, 1, 1);
         grandChild1Replica->setTransform(reflection);
-        grandChild1->setReplicaLayer(grandChild1Replica.release());
+        grandChild1->setReplicaLayer(grandChild1Replica.Pass());
     }
     CCLayerImpl* grandChild1Replica = grandChild1->replicaLayer();
 
     // Set up the mask layer on the replica layer
     {
-        OwnPtr<CCLayerImpl> replicaMaskLayer = CCLayerImpl::create(7);
+        scoped_ptr<CCLayerImpl> replicaMaskLayer = CCLayerImpl::create(7);
         replicaMaskLayer->setPosition(FloatPoint::zero());
         replicaMaskLayer->setAnchorPoint(FloatPoint::zero());
         replicaMaskLayer->setBounds(grandChild1->bounds());
         replicaMaskLayer->setContentBounds(grandChild1->bounds());
-        grandChild1Replica->setMaskLayer(replicaMaskLayer.release());
+        grandChild1Replica->setMaskLayer(replicaMaskLayer.Pass());
     }
     CCLayerImpl* replicaMaskLayer = grandChild1Replica->maskLayer();
 
     emulateDrawingOneFrame(root.get());
 
     // Sanity check that the appropriate render surfaces were created
     ASSERT_TRUE(grandChild1->renderSurface());
 
     // CASE 1: a property change on the mask should damage only the reflected region on the target surface.
     clearDamageForAllSurfaces(root.get());
     replicaMaskLayer->setStackingOrderChanged(true);
     emulateDrawingOneFrame(root.get());
 
     FloatRect grandChildDamageRect = grandChild1->renderSurface()->damageTracker()->currentDamageRect();
     FloatRect childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
 
     EXPECT_TRUE(grandChildDamageRect.isEmpty());
     EXPECT_FLOAT_RECT_EQ(FloatRect(194, 200, 6, 8), childDamageRect);
 
     // CASE 2: removing the replica mask damages only the reflected region on the target surface.
     //
     clearDamageForAllSurfaces(root.get());
-    grandChild1Replica->setMaskLayer(nullptr);
+    grandChild1Replica->setMaskLayer(scoped_ptr<CCLayerImpl>());
     emulateDrawingOneFrame(root.get());
 
     grandChildDamageRect = grandChild1->renderSurface()->damageTracker()->currentDamageRect();
     childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
 
     EXPECT_TRUE(grandChildDamageRect.isEmpty());
     EXPECT_FLOAT_RECT_EQ(FloatRect(194, 200, 6, 8), childDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForReplicaMaskWithAnchor)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithTwoSurfaces();
     CCLayerImpl* child1 = root->children()[0];
     CCLayerImpl* grandChild1 = child1->children()[0];
 
     // Verify that the correct replicaOriginTransform is used for the replicaMask;
     clearDamageForAllSurfaces(root.get());
 
     grandChild1->setAnchorPoint(FloatPoint(1, 0)); // This is not exactly the anchor being tested, but by convention its expected to be the same as the replica's anchor point.
 
     {
-        OwnPtr<CCLayerImpl> grandChild1Replica = CCLayerImpl::create(6);
+        scoped_ptr<CCLayerImpl> grandChild1Replica = CCLayerImpl::create(6);
         grandChild1Replica->setPosition(FloatPoint::zero());
         grandChild1Replica->setAnchorPoint(FloatPoint(1, 0)); // This is the anchor being tested.
         WebTransformationMatrix reflection;
         reflection.scale3d(-1, 1, 1);
         grandChild1Replica->setTransform(reflection);
-        grandChild1->setReplicaLayer(grandChild1Replica.release());
+        grandChild1->setReplicaLayer(grandChild1Replica.Pass());
     }
     CCLayerImpl* grandChild1Replica = grandChild1->replicaLayer();
 
     // Set up the mask layer on the replica layer
     {
-        OwnPtr<CCLayerImpl> replicaMaskLayer = CCLayerImpl::create(7);
+        scoped_ptr<CCLayerImpl> replicaMaskLayer = CCLayerImpl::create(7);
         replicaMaskLayer->setPosition(FloatPoint::zero());
         replicaMaskLayer->setAnchorPoint(FloatPoint::zero()); // note, this is not the anchor being tested.
         replicaMaskLayer->setBounds(grandChild1->bounds());
         replicaMaskLayer->setContentBounds(grandChild1->bounds());
-        grandChild1Replica->setMaskLayer(replicaMaskLayer.release());
+        grandChild1Replica->setMaskLayer(replicaMaskLayer.Pass());
     }
     CCLayerImpl* replicaMaskLayer = grandChild1Replica->maskLayer();
 
     emulateDrawingOneFrame(root.get());
 
     // Sanity check that the appropriate render surfaces were created
     ASSERT_TRUE(grandChild1->renderSurface());
 
     // A property change on the replicaMask should damage the reflected region on the target surface.
     clearDamageForAllSurfaces(root.get());
     replicaMaskLayer->setStackingOrderChanged(true);
 
     emulateDrawingOneFrame(root.get());
 
     FloatRect childDamageRect = child1->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(206, 200, 6, 8), childDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageWhenForcedFullDamage)
 {
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     // Case 1: This test ensures that when the tracker is forced to have full damage, that
     //         it takes priority over any other partial damage.
     //
     clearDamageForAllSurfaces(root.get());
     child->setUpdateRect(FloatRect(10, 11, 12, 13));
     root->renderSurface()->damageTracker()->forceFullDamageNextUpdate();
     emulateDrawingOneFrame(root.get());
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(0, 0, 500, 500), rootDamageRect);
 
     // Case 2: An additional sanity check that forcing full damage works even when nothing
     //         on the layer tree changed.
     //
     clearDamageForAllSurfaces(root.get());
     root->renderSurface()->damageTracker()->forceFullDamageNextUpdate();
     emulateDrawingOneFrame(root.get());
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(0, 0, 500, 500), rootDamageRect);
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageForEmptyLayerList)
 {
     // Though it should never happen, its a good idea to verify that the damage tracker
     // does not crash when it receives an empty layerList.
 
-    OwnPtr<CCLayerImpl> root = CCLayerImpl::create(1);
+    scoped_ptr<CCLayerImpl> root = CCLayerImpl::create(1);
     root->createRenderSurface();
 
     ASSERT_TRUE(root == root->renderTarget());
     CCRenderSurface* targetSurface = root->renderSurface();
     targetSurface->clearLayerLists();
     targetSurface->damageTracker()->updateDamageTrackingState(targetSurface->layerList(), targetSurface->owningLayerId(), false, IntRect(), 0, WebFilterOperations());
 
     FloatRect damageRect = targetSurface->damageTracker()->currentDamageRect();
     EXPECT_TRUE(damageRect.isEmpty());
 }
 
 TEST_F(CCDamageTrackerTest, verifyDamageAccumulatesUntilReset)
 {
     // If damage is not cleared, it should accumulate.
 
-    OwnPtr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
+    scoped_ptr<CCLayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     CCLayerImpl* child = root->children()[0];
 
     clearDamageForAllSurfaces(root.get());
     child->setUpdateRect(FloatRect(10, 11, 1, 2));
     emulateDrawingOneFrame(root.get());
 
     // Sanity check damage after the first frame; this isnt the actual test yet.
     FloatRect rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(110, 111, 1, 2), rootDamageRect);
 
     // New damage, without having cleared the previous damage, should be unioned to the previous one.
     child->setUpdateRect(FloatRect(20, 25, 1, 2));
     emulateDrawingOneFrame(root.get());
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_FLOAT_RECT_EQ(FloatRect(110, 111, 11, 16), rootDamageRect);
 
     // If we notify the damage tracker that we drew the damaged area, then damage should be emptied.
     root->renderSurface()->damageTracker()->didDrawDamagedArea();
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(rootDamageRect.isEmpty());
 
     // Damage should remain empty even after one frame, since there's yet no new damage
     emulateDrawingOneFrame(root.get());
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(rootDamageRect.isEmpty());
 }
 
 } // namespace