cc: Remove SetLayerTreeHostClientReady()

cc/trees/layer_tree_host_unittest.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/location.h"
@@ skipping 4868 matching lines @@
 
   void DidCommit() override { layer_tree_host()->SetVisible(false); }
 
   void DidSetVisibleOnImplTree(LayerTreeHostImpl* host_impl,
                                bool visible) override {
     visible_ = visible;
 
     // Once invisible, we can go visible again.
     if (!visible) {
       PostSetVisibleToMainThread(true);
-    } else {
+    } else if (activation_count_) {
       EXPECT_TRUE(host_impl->RequiresHighResToDraw());
       EndTest();
     }
   }
 
   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
     ++activation_count_;
     EXPECT_FALSE(visible_);
   }
 
@@ skipping 1488 matching lines @@
     EndTest();
   }
 
   void AfterTest() override {}
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostTestDestroyWhileInitializingOutputSurface);
 
 }  // namespace
 }  // namespace cc