CC Animation: Rework iterations over players to use the range-based for loop.

cc/animation/element_animations_unittest.cc

Index: cc/animation/element_animations_unittest.cc
diff --git a/cc/animation/element_animations_unittest.cc b/cc/animation/element_animations_unittest.cc
index 012743a4beb4aaf0e3abe9637f2651ea51ef89de..dedfddb4866b145961f123963211170691e2f00a 100644
--- a/cc/animation/element_animations_unittest.cc
+++ b/cc/animation/element_animations_unittest.cc
@@ -175,11 +175,8 @@ TEST_F(ElementAnimationsTest, AddRemovePlayers) {
   EXPECT_TRUE(element_animations_impl);
 
   int list_size_before = 0;
-  ElementAnimations::PlayersList::Iterator it(
-      &element_animations_impl_->players_list());
-  AnimationPlayer* player;
-  while ((player = it.GetNext()) != nullptr) {
-    EXPECT_TRUE(timeline_->GetPlayerById(player->id()));
+  for (auto& player : element_animations_impl_->players_list()) {
+    EXPECT_TRUE(timeline_->GetPlayerById(player.id()));
     ++list_size_before;
   }
   EXPECT_EQ(3, list_size_before);
@@ -193,10 +190,8 @@ TEST_F(ElementAnimationsTest, AddRemovePlayers) {
   EXPECT_EQ(element_animations_impl, player_impl_->element_animations());
 
   int list_size_after = 0;
-  it = ElementAnimations::PlayersList::Iterator(
-      &element_animations_impl_->players_list());
-  while ((player = it.GetNext()) != nullptr) {
-    EXPECT_TRUE(timeline_->GetPlayerById(player->id()));
+  for (auto& player : element_animations_impl_->players_list()) {
+    EXPECT_TRUE(timeline_->GetPlayerById(player.id()));
     ++list_size_after;
   }
   EXPECT_EQ(2, list_size_after);