Reenable CCOcclusionTrackerTestViewportRectOverChild test.

cc/CCOcclusionTrackerTest.cpp

 // 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 "config.h"
 
 #include "CCOcclusionTracker.h"
 
 #include "CCAnimationTestCommon.h"
 #include "CCGeometryTestUtils.h"
@@ skipping 1465 matching lines @@
         EXPECT_TRUE(occlusion.occluded(parent, IntRect(200, 100, 100, 100)));
         EXPECT_TRUE(occlusion.occluded(parent, IntRect(200, 0, 100, 100)));
         EXPECT_TRUE(occlusion.occluded(parent, IntRect(0, 200, 100, 100)));
         EXPECT_TRUE(occlusion.occluded(parent, IntRect(100, 200, 100, 100)));
         EXPECT_TRUE(occlusion.occluded(parent, IntRect(200, 200, 100, 100)));
 
         EXPECT_TRUE(occlusion.unoccludedContentRect(parent, IntRect(0, 0, 300, 300)).isEmpty());
     }
 };
 
-// Test is flaky on xp bots. http://crbug.com/148906.
-// ALL_CCOCCLUSIONTRACKER_TEST(CCOcclusionTrackerTestViewportRectOverChild);
+ALL_CCOCCLUSIONTRACKER_TEST(CCOcclusionTrackerTestViewportRectOverChild);
 
 template<class Types, bool opaqueLayers>
 class CCOcclusionTrackerTestLayerClipRectPartlyOverChild : public CCOcclusionTrackerTest<Types, opaqueLayers> {
 protected:
     void runMyTest()
     {
         typename Types::ContentLayerType* parent = this->createRoot(this->identityMatrix, FloatPoint(0, 0), IntSize(300, 300));
         typename Types::ContentLayerType* layer = this->createDrawingSurface(parent, this->identityMatrix, FloatPoint(0, 0), IntSize(200, 200), true);
         this->calcDrawEtc(parent);
 
@@ skipping 1509 matching lines @@
         EXPECT_RECT_EQ(IntRect(IntPoint(), trackingSize), occlusion.occlusionInScreenSpace().bounds());
         EXPECT_EQ(1u, occlusion.occlusionInScreenSpace().rects().size());
         EXPECT_RECT_EQ(IntRect(IntPoint(), trackingSize), occlusion.occlusionInTargetSurface().bounds());
         EXPECT_EQ(1u, occlusion.occlusionInTargetSurface().rects().size());
     }
 };
 
 ALL_CCOCCLUSIONTRACKER_TEST(CCOcclusionTrackerTestMinimumTrackingSize);
 
 } // namespace