[cc] Add window decoration layers (NinePatch)

cc/DecorationLayerChromium.h

Index: cc/DecorationLayerChromium.h
diff --git a/third_party/tcmalloc/vendor/src/base/spinlock_internal.h b/cc/DecorationLayerChromium.h
similarity index 52%
copy from third_party/tcmalloc/vendor/src/base/spinlock_internal.h
copy to cc/DecorationLayerChromium.h
index 44942609f40a87492a7aeed0068a5e27bf9cd157..ae7933a84e16236cd3226d910e3f1c455eb7ab86 100644
--- a/third_party/tcmalloc/vendor/src/base/spinlock_internal.h
+++ b/cc/DecorationLayerChromium.h
@@ -1,5 +1,5 @@
-/* Copyright (c) 2010, Google Inc.
- * All rights reserved.
+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -26,39 +26,52 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ---
- * This file is an internal part spinlock.cc and once.cc
- * It may not be used directly by code outside of //base.
  */
 
-#ifndef BASE_SPINLOCK_INTERNAL_H_
-#define BASE_SPINLOCK_INTERNAL_H_
 
-#include <config.h>
-#include "base/basictypes.h"
-#include "base/atomicops.h"
+#ifndef DecorationLayerChromium_h
+#define DecorationLayerChromium_h
+
+#if USE(ACCELERATED_COMPOSITING)

[danakj, 2012/09/24 14:35:00]

nit: drop the ACCELERATED_COMPOSITING in new files.

+
+#include "LayerChromium.h"
+#include "LayerTextureUpdater.h"
+#include "SkBitmap.h"
+
+namespace cc {
+
+class DecorationLayerTextureUpdater;
+
+// A Layer that contains sparse quads being sourced from bitmaps.
+class DecorationLayerChromium : public LayerChromium {
+public:
+    static PassRefPtr<DecorationLayerChromium> create();
+    virtual ~DecorationLayerChromium();
 
-namespace base {
-namespace internal {
+    virtual bool drawsContent() const OVERRIDE;
+    virtual void setTexturePriorities(const CCPriorityCalculator&) OVERRIDE;
+    virtual void update(CCTextureUpdateQueue&, const CCOcclusionTracker*, CCRenderingStats&) OVERRIDE;
+    virtual bool needsContentsScale() const OVERRIDE;
+    virtual void pushPropertiesTo(CCLayerImpl*) OVERRIDE;
 
-// SpinLockWait() waits until it can perform one of several transitions from
-// "from" to "to".  It returns when it performs a transition where done==true.
-struct SpinLockWaitTransition {
-  int32 from;
-  int32 to;
-  bool done;
+    void setBitmap(const SkBitmap& bitmap, const IntRect& aperture);
+
+private:
+    DecorationLayerChromium();
+    PassOwnPtr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
+
+    virtual void createTextureUpdaterIfNeeded() OVERRIDE;
+
+    RefPtr<DecorationLayerTextureUpdater> m_textureUpdater;
+    OwnPtr<LayerTextureUpdater::Texture> m_texture;
+
+    SkBitmap m_bitmap;
+
+    // The transparent center region that shows the parent layer's contents in image space.
+    IntRect m_imageAperture;
 };
 
-// Wait until *w can transition from trans[i].from to trans[i].to for some i
-// satisfying 0<=i<n && trans[i].done, atomically make the transition,
-// then return the old value of *w.   Make any other atomic tranistions
-// where !trans[i].done, but continue waiting.
-int32 SpinLockWait(volatile Atomic32 *w, int n,
-                   const SpinLockWaitTransition trans[]);
-void SpinLockWake(volatile Atomic32 *w, bool all);
-void SpinLockDelay(volatile Atomic32 *w, int32 value, int loop);
-
-} // namespace internal
-} // namespace base
+}
+#endif // USE(ACCELERATED_COMPOSITING)
+
 #endif