Here are gyp targets and stubs for compiling libcc and the webkit_compositor bindings in chromium. Everything is guarded behind the off-by-default use_libcc_for_compositor gyp variable. I haven't included the actual code here, but there are scripts to sync. I plan to land + manually sync the code into place until we're ready to flip the gyp switch.

Snapshot from r126652

BUG=

Review URL: https://chromiumcodereview.appspot.com/10828381

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@153354 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 53 insertions, 0 deletions

diff --git a/cc/RateLimiter.h b/cc/RateLimiter.h
new file mode 100644
index 0000000..8cb8a1d
--- /dev/null
+++ b/cc/RateLimiter.h
@@ -0,0 +1,53 @@
+// 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.
+
+#ifndef RateLimiter_h
+#define RateLimiter_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebKit {
+class WebGraphicsContext3D;
+}
+
+namespace WebCore {
+
+class RateLimiterClient {
+public:
+    virtual void rateLimit() = 0;
+};
+
+// A RateLimiter can be used to make sure that a single context does not dominate all execution time.
+// To use, construct a RateLimiter class around the context and call start() whenever calls are made on the
+// context outside of normal flow control. RateLimiter will block if the context is too far ahead of the
+// compositor.
+class RateLimiter : public RefCounted<RateLimiter> {
+public:
+    static PassRefPtr<RateLimiter> create(WebKit::WebGraphicsContext3D*, RateLimiterClient*);
+    ~RateLimiter();
+
+    void start();
+
+    // Context and client will not be accessed after stop().
+    void stop();
+
+private:
+    RateLimiter(WebKit::WebGraphicsContext3D*, RateLimiterClient*);
+
+    class Task;
+    friend class Task;
+    void rateLimitContext();
+
+    WebKit::WebGraphicsContext3D* m_context;
+    bool m_active;
+    RateLimiterClient *m_client;
+};
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)
+
+#endif