Eliminate WindowTreeConnection

mash/wm/test/wm_test_base.h

Index: mash/wm/test/wm_test_base.h
diff --git a/mash/wm/test/wm_test_base.h b/mash/wm/test/wm_test_base.h
index 0dfd737fbb8c28ad3b5851bb7b92ceea862c13b7..fb79e965ae6e1c32c9626612f9b190cfda85e9a3 100644
--- a/mash/wm/test/wm_test_base.h
+++ b/mash/wm/test/wm_test_base.h
@@ -31,7 +31,7 @@ class RootWindowController;
 class WmTestHelper;
 
 // Base class for window manager tests that want to configure
-// WindowTreeConnection without a connection to mus.
+// WindowTreeClient without a client to mus.
 class WmTestBase : public testing::Test {
  public:
   WmTestBase();
@@ -52,7 +52,7 @@ class WmTestBase : public testing::Test {
 
   // Creates a top level window visible window in the appropriate container.
   // NOTE: you can explicitly destroy the returned value if necessary, but it
-  // will also be automatically destroyed when the WindowTreeConnection is
+  // will also be automatically destroyed when the WindowTreeClient is
   // destroyed.
   mus::Window* CreateTestWindow(const gfx::Rect& bounds);
   mus::Window* CreateTestWindow(const gfx::Rect& bounds,