toggle FPS counter in compositor

cc/heads_up_display_layer.cc

 // Copyright 2012 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/heads_up_display_layer.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/heads_up_display_layer_impl.h"
 #include "cc/layer_tree_host.h"
 
 namespace cc {
 
 scoped_refptr<HeadsUpDisplayLayer> HeadsUpDisplayLayer::create()
 {
     return make_scoped_refptr(new HeadsUpDisplayLayer());
 }
 
 HeadsUpDisplayLayer::HeadsUpDisplayLayer()
     : Layer()
+    , m_showFPSCounter(false)
 {
-
     setBounds(gfx::Size(256, 128));
 }
 
 HeadsUpDisplayLayer::~HeadsUpDisplayLayer()
 {
 }
 
 void HeadsUpDisplayLayer::update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats&)
 {
     const LayerTreeSettings& settings = layerTreeHost()->settings();
@@ skipping 15 matching lines @@
 {
     return true;
 }
 
 void HeadsUpDisplayLayer::setFontAtlas(scoped_ptr<FontAtlas> fontAtlas)
 {
     m_fontAtlas = fontAtlas.Pass();
     setNeedsCommit();
 }
 
+void HeadsUpDisplayLayer::setShowFPSCounter(bool show)
+{
+    m_showFPSCounter = show;
+    setNeedsCommit();
+}
+
 scoped_ptr<LayerImpl> HeadsUpDisplayLayer::createLayerImpl()
 {
     return HeadsUpDisplayLayerImpl::create(m_layerId).PassAs<LayerImpl>();
 }
 
 void HeadsUpDisplayLayer::pushPropertiesTo(LayerImpl* layerImpl)
 {
     Layer::pushPropertiesTo(layerImpl);
 
-    if (!m_fontAtlas.get())
-        return;
+    HeadsUpDisplayLayerImpl* hudLayerImpl = static_cast<HeadsUpDisplayLayerImpl*>(layerImpl);
+    hudLayerImpl->setShowFPSCounter(m_showFPSCounter);
 
-    HeadsUpDisplayLayerImpl* hudLayerImpl = static_cast<HeadsUpDisplayLayerImpl*>(layerImpl);
-    hudLayerImpl->setFontAtlas(m_fontAtlas.Pass());
+    if (m_fontAtlas.get())
+        hudLayerImpl->setFontAtlas(m_fontAtlas.Pass());
 }
 
 }  // namespace cc