A host of micro-optimizations and a refactor of TimeForBoundsToIntersect

cc/tile_priority_unittest.cc

Index: cc/tile_priority_unittest.cc
diff --git a/cc/tile_priority_unittest.cc b/cc/tile_priority_unittest.cc
index bcca044f7733132dcd5af1d1097e831340c90709..5eea2b4d22cd0d69eadaef3e70c82cb50dec447f 100644
--- a/cc/tile_priority_unittest.cc
+++ b/cc/tile_priority_unittest.cc
@@ -10,6 +10,7 @@ namespace cc {
 namespace {
 
 TEST(TilePriorityTest, TimeForBoundsToIntersectWithScroll) {
+  const float inf = std::numeric_limits<float>::infinity();
   gfx::Rect target(0, 0, 800, 600);
   gfx::Rect current(100, 100, 100, 100);
   EXPECT_EQ(0, TilePriority::TimeForBoundsToIntersect(
@@ -20,15 +21,16 @@ TEST(TilePriorityTest, TimeForBoundsToIntersectWithScroll) {
       gfx::Rect(400, 400, 100, 100), current, 1, target));
 
   current = gfx::Rect(-300, -300, 100, 100);
-  EXPECT_EQ(1000, TilePriority::TimeForBoundsToIntersect(
+  EXPECT_EQ(inf, TilePriority::TimeForBoundsToIntersect(
       gfx::Rect(0, 0, 100, 100), current, 1, target));
-  EXPECT_EQ(1000, TilePriority::TimeForBoundsToIntersect(
+  EXPECT_EQ(inf, TilePriority::TimeForBoundsToIntersect(
       gfx::Rect(-200, -200, 100, 100), current, 1, target));
   EXPECT_EQ(2, TilePriority::TimeForBoundsToIntersect(
       gfx::Rect(-400, -400, 100, 100), current, 1, target));
 }
 
 TEST(TilePriorityTest, TimeForBoundsToIntersectWithScale) {
+  const float inf = std::numeric_limits<float>::infinity();
   gfx::Rect target(0, 0, 800, 600);
   gfx::Rect current(100, 100, 100, 100);
   EXPECT_EQ(0, TilePriority::TimeForBoundsToIntersect(
@@ -39,7 +41,7 @@ TEST(TilePriorityTest, TimeForBoundsToIntersectWithScale) {
       gfx::Rect(400, 400, 400, 400), current, 1, target));
 
   current = gfx::Rect(-300, -300, 100, 100);
-  EXPECT_EQ(1000, TilePriority::TimeForBoundsToIntersect(
+  EXPECT_EQ(inf, TilePriority::TimeForBoundsToIntersect(
       gfx::Rect(-400, -400, 300, 300), current, 1, target));
   EXPECT_EQ(8, TilePriority::TimeForBoundsToIntersect(
       gfx::Rect(-275, -275, 50, 50), current, 1, target));