Use LCD text if the transform IsAlmostIdentityAndIntegerTranslation

cc/layer_tree_host_common_unittest.cc

Index: cc/layer_tree_host_common_unittest.cc
diff --git a/cc/layer_tree_host_common_unittest.cc b/cc/layer_tree_host_common_unittest.cc
index 926ae2ba364041be4a0fcdcdba8f01328d4e20b2..099cb05d23980b4125b7718431c9e8cbde1424a9 100644
--- a/cc/layer_tree_host_common_unittest.cc
+++ b/cc/layer_tree_host_common_unittest.cc
@@ -5147,5 +5147,34 @@ INSTANTIATE_TEST_CASE_P(LayerTreeHostCommonTest,
                         testing::Combine(testing::Bool(),
                                          testing::Bool()));
 
+TEST(LayerTreeHostCommonTest, verifyRoundAlmostIntegerComponentsInTransforms)
+{
+    const float kPageScale = 0.9f;
+    const float kDeviceScale = 1.234567f;
+
+    FakeImplProxy proxy;
+    FakeLayerTreeHostImpl hostImpl(&proxy);
+
+    gfx::Transform implTransform;
+    implTransform.Scale(kPageScale, kPageScale);
+
+    gfx::Transform identityMatrix;
+    scoped_ptr<LayerImpl> layerScopedPtr = LayerImpl::create(hostImpl.activeTree(), 1);
+    LayerImpl* layer = layerScopedPtr.get();
+    layer->setContentsScale(kPageScale * kDeviceScale, kPageScale * kDeviceScale);
+    setLayerPropertiesForTesting(layer, identityMatrix, identityMatrix, gfx::Point(0, 0), gfx::PointF(0, 0), gfx::Size(500, 500), false);
+
+    scoped_ptr<LayerImpl> root = LayerImpl::create(hostImpl.activeTree(), 2);
+    root->setContentsScale(kPageScale * kDeviceScale, kPageScale * kDeviceScale);
+    root->setImplTransform(implTransform);
+    root->addChild(layerScopedPtr.Pass());
+
+    executeCalculateDrawProperties(root.get(), kDeviceScale, kPageScale, true);
+    EXPECT_TRUE(layer->drawTransform().IsAlmostIdentity());
+    EXPECT_TRUE(layer->canUseLCDText());
+    EXPECT_TRUE(root->drawTransform().IsAlmostIdentity());
+    EXPECT_TRUE(root->canUseLCDText());
+}
+
 }  // namespace
 }  // namespace cc