cc: Stretch textures by .5 texels to prevent out of bounds sampling

cc/picture_layer_tiling_unittest.cc

Index: cc/picture_layer_tiling_unittest.cc
diff --git a/cc/picture_layer_tiling_unittest.cc b/cc/picture_layer_tiling_unittest.cc
index 9e840d9e06fb03b3f474432631f7bfb65da18adc..8b825d1a4a46155bb2f20a28e9b8b5592923c135 100644
--- a/cc/picture_layer_tiling_unittest.cc
+++ b/cc/picture_layer_tiling_unittest.cc
@@ -42,7 +42,8 @@ class PictureLayerTilingIteratorTest : public testing::Test {
     Region remaining = expect_rect;
     for (PictureLayerTiling::Iterator iter(tiling_.get(),
                                            rect_scale,
-                                           request_rect);
+                                           request_rect,
+                                           PictureLayerTiling::LayerDeviceAlignmentUnknown);
          iter;
          ++iter) {
 
@@ -143,14 +144,16 @@ TEST_F(PictureLayerTilingIteratorTest, IteratorEmptyRect) {
   Initialize(gfx::Size(100, 100), 1.0f, gfx::Size(800, 600));
 
   gfx::Rect empty;
-  PictureLayerTiling::Iterator iter(tiling_.get(), 1.0f, empty);
+  PictureLayerTiling::Iterator iter(tiling_.get(), 1.0f, empty,
+                                    PictureLayerTiling::LayerDeviceAlignmentUnknown);
   EXPECT_FALSE(iter);
 }
 
 TEST_F(PictureLayerTilingIteratorTest, NonIntersectingRect) {
   Initialize(gfx::Size(100, 100), 1.0f, gfx::Size(800, 600));
   gfx::Rect non_intersecting(1000, 1000, 50, 50);
-  PictureLayerTiling::Iterator iter(tiling_.get(), 1, non_intersecting);
+  PictureLayerTiling::Iterator iter(tiling_.get(), 1, non_intersecting,
+                                    PictureLayerTiling::LayerDeviceAlignmentUnknown);
   EXPECT_FALSE(iter);
 }