cc: Rename TileManager::ManageTiles to PrepareTiles.

cc/resources/tile_manager.cc

Index: cc/resources/tile_manager.cc
diff --git a/cc/resources/tile_manager.cc b/cc/resources/tile_manager.cc
index 66f95da9444cc36054c916c780088473282fdb52..300c5cfa850dab439b27cd2a430213e7f7adb2c0 100644
--- a/cc/resources/tile_manager.cc
+++ b/cc/resources/tile_manager.cc
@@ -400,8 +400,9 @@ void TileManager::DidFinishRunningTasks(TaskSet task_set) {
   NOTREACHED();
 }
 
-void TileManager::ManageTiles(const GlobalStateThatImpactsTilePriority& state) {
-  TRACE_EVENT0("cc", "TileManager::ManageTiles");
+void TileManager::PrepareTiles(
+    const GlobalStateThatImpactsTilePriority& state) {
+  TRACE_EVENT0("cc", "TileManager::PrepareTiles");
 
   global_state_ = state;