Fix remaining cc files to compile with Clang

cc/CCHeadsUpDisplayLayerImpl.cpp

 // 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 "CCHeadsUpDisplayLayerImpl.h"
 
 #include "base/stringprintf.h"
 #include "CCDebugRectHistory.h"
@@ skipping 108 matching lines @@
     // parent compositor. We will probably need to hold on to m_hudTexture for
     // longer, and have several HUD textures in the pipeline.
     ASSERT(!resourceProvider->inUseByConsumer(m_hudTexture->id()));
 }
 
 void CCHeadsUpDisplayLayerImpl::didLoseContext()
 {
     m_hudTexture.clear();
 }
 
+bool CCHeadsUpDisplayLayerImpl::layerIsAlwaysDamaged() const
+{
+    return true;
+}
+
 void CCHeadsUpDisplayLayerImpl::drawHudContents(SkCanvas* canvas)
 {
     const CCLayerTreeSettings& settings = layerTreeHostImpl()->settings();
 
     if (settings.showPlatformLayerTree) {
         SkPaint paint = createPaint();
         paint.setColor(SkColorSetARGB(192, 0, 0, 0));
         canvas->drawRect(SkRect::MakeXYWH(0, 0, bounds().width(), bounds().height()), paint);
     }
 
@@ skipping 136 matching lines @@
         paint.setColor(fillColor);
         canvas->drawRect(skRect, paint);
 
         paint.setColor(strokeColor);
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeWidth(2);
         canvas->drawRect(skRect, paint);
     }
 }
 
+const char* CCHeadsUpDisplayLayerImpl::layerTypeAsString() const
+{
+    return "HeadsUpDisplayLayer";
 }
+
+}