cc: Don't schedule top controls animation when there isn't one

cc/trees/layer_tree_host_impl_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_impl.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 5793 matching lines @@
                                      host_impl_.get(),
                                      &set_needs_commit_count,
                                      &set_needs_redraw_count));
     // Empty damage rect won't signal the monitor.
     host_impl_->SetNeedsRedrawRect(gfx::Rect());
     EXPECT_EQ(0, set_needs_commit_count);
     EXPECT_EQ(2, set_needs_redraw_count);
   }
 }
 
+class LayerTreeHostImplWithTopControlsTest : public LayerTreeHostImplTest {
+ public:
+  virtual void SetUp() OVERRIDE {
+    LayerTreeSettings settings = DefaultSettings();
+    settings.calculate_top_controls_position = true;
+    CreateHostImpl(settings, CreateOutputSurface());
+  }
+};
+
+TEST_F(LayerTreeHostImplWithTopControlsTest, NoIdleAnimations) {
+  SetupScrollAndContentsLayers(gfx::Size(100, 100))
+      ->SetScrollOffset(gfx::Vector2d(0, 10));
+  host_impl_->Animate(base::TimeTicks(), base::Time());
+  EXPECT_FALSE(did_request_redraw_);
+}
+
 }  // namespace
 }  // namespace cc