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..0f353da34014804d76324d01b2bb0b2f04381bcc 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;
 
@@ -424,10 +425,7 @@ void TileManager::ManageTiles(const GlobalStateThatImpactsTilePriority& state) {
   did_notify_ready_to_activate_ = false;
   did_notify_ready_to_draw_ = false;
 
-  TRACE_EVENT_INSTANT1("cc",
-                       "DidManage",
-                       TRACE_EVENT_SCOPE_THREAD,
-                       "state",
+  TRACE_EVENT_INSTANT1("cc", "DidPrepare", TRACE_EVENT_SCOPE_THREAD, "state",
                        BasicStateAsValue());
 
   TRACE_COUNTER_ID1("cc",