cc: Add SwapPromiseManager and SurfaceSequenceGenerator.

cc/trees/swap_promise_monitor.cc

Index: cc/trees/swap_promise_monitor.cc
diff --git a/cc/trees/swap_promise_monitor.cc b/cc/trees/swap_promise_monitor.cc
index 56956bf29ac556d243445328f5851e3a6e777679..6a7492aedab8a45aebfa8f7c0f2804cc069c4984 100644
--- a/cc/trees/swap_promise_monitor.cc
+++ b/cc/trees/swap_promise_monitor.cc
@@ -3,27 +3,27 @@
 // found in the LICENSE file.
 
 #include "base/logging.h"
-#include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_host_impl.h"
+#include "cc/trees/swap_promise_manager.h"
 #include "cc/trees/swap_promise_monitor.h"
 
 namespace cc {
 
-SwapPromiseMonitor::SwapPromiseMonitor(LayerTreeHostInterface* layer_tree_host,
+SwapPromiseMonitor::SwapPromiseMonitor(SwapPromiseManager* swap_promise_manager,
                                        LayerTreeHostImpl* layer_tree_host_impl)
-    : layer_tree_host_(layer_tree_host),
+    : swap_promise_manager_(swap_promise_manager),
       layer_tree_host_impl_(layer_tree_host_impl) {
-  DCHECK((layer_tree_host && !layer_tree_host_impl) ||
-         (!layer_tree_host && layer_tree_host_impl));
-  if (layer_tree_host_)
-    layer_tree_host_->InsertSwapPromiseMonitor(this);
+  DCHECK((swap_promise_manager && !layer_tree_host_impl) ||
+         (!swap_promise_manager && layer_tree_host_impl));
+  if (swap_promise_manager)
+    swap_promise_manager->InsertSwapPromiseMonitor(this);
   if (layer_tree_host_impl_)
     layer_tree_host_impl_->InsertSwapPromiseMonitor(this);
 }
 
 SwapPromiseMonitor::~SwapPromiseMonitor() {
-  if (layer_tree_host_)
-    layer_tree_host_->RemoveSwapPromiseMonitor(this);
+  if (swap_promise_manager_)
+    swap_promise_manager_->RemoveSwapPromiseMonitor(this);
   if (layer_tree_host_impl_)
     layer_tree_host_impl_->RemoveSwapPromiseMonitor(this);
 }