Remove root layer specialness in calculateDrawTransforms

cc/test/layer_tree_test_common.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 "config.h"
 
 #include "cc/test/layer_tree_test_common.h"
 
 #include "base/stl_util.h"
 #include "cc/active_animation.h"
@@ skipping 332 matching lines @@
 void ThreadedTest::endTestAfterDelay(int delayMilliseconds)
 {
     m_mainThreadProxy->postTask(createThreadTask(this, &ThreadedTest::endTest));
 }
 
 void ThreadedTest::postSetNeedsAnimateToMainThread()
 {
     m_mainThreadProxy->postTask(createThreadTask(this, &ThreadedTest::dispatchSetNeedsAnimate));
 }
 
-void ThreadedTest::postAddAnimationToMainThread()
+void ThreadedTest::postAddAnimationToMainThread(Layer* layerToReceiveAnimation)
 {
-    m_mainThreadProxy->postTask(createThreadTask(this, &ThreadedTest::dispatchAddAnimation));
+    m_mainThreadProxy->postTask(createThreadTask(this, &ThreadedTest::dispatchAddAnimation, layerToReceiveAnimation));
 }
 
 void ThreadedTest::postAddInstantAnimationToMainThread()
 {
     m_mainThreadProxy->postTask(createThreadTask(this, &ThreadedTest::dispatchAddInstantAnimation));
 }
 
 void ThreadedTest::postSetNeedsCommitToMainThread()
 {
     m_mainThreadProxy->postTask(createThreadTask(this, &ThreadedTest::dispatchSetNeedsCommit));
@@ skipping 83 matching lines @@
 {
     DCHECK(Proxy::isMainThread());
 
     if (m_finished)
         return;
 
     if (m_layerTreeHost.get() && m_layerTreeHost->rootLayer())
         addOpacityTransitionToLayer(*m_layerTreeHost->rootLayer(), 0, 0, 0.5, false);
 }
 
-void ThreadedTest::dispatchAddAnimation()
+void ThreadedTest::dispatchAddAnimation(Layer* layerToReceiveAnimation)
 {
     DCHECK(Proxy::isMainThread());
 
     if (m_finished)
         return;
 
-    if (m_layerTreeHost.get() && m_layerTreeHost->rootLayer())
-        addOpacityTransitionToLayer(*m_layerTreeHost->rootLayer(), 10, 0, 0.5, true);
+    if (layerToReceiveAnimation)
+        addOpacityTransitionToLayer(*layerToReceiveAnimation, 10, 0, 0.5, true);
 }
 
 void ThreadedTest::dispatchSetNeedsAnimateAndCommit()
 {
     DCHECK(Proxy::isMainThread());
 
     if (m_finished)
         return;
 
     if (m_layerTreeHost.get()) {
@@ skipping 99 matching lines @@
     if (m_timedOut) {
         FAIL() << "Test timed out";
         Platform::current()->compositorSupport()->shutdown();
         return;
     }
     afterTest();
     Platform::current()->compositorSupport()->shutdown();
 }
 
 }  // namespace WebKitTests