Move gl_bindings_skia_cmd_buffer into webkit_gpu and make the latter a component

webkit/gpu/webkit_gpu_export.h

Index: webkit/gpu/webkit_gpu_export.h
diff --git a/webkit/gpu/webkit_gpu_export.h b/webkit/gpu/webkit_gpu_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..486f78e79d5d2ccdf88d0b4cdf19ac13c66ec46a
--- /dev/null
+++ b/webkit/gpu/webkit_gpu_export.h
@@ -0,0 +1,29 @@
+// Copyright (c) 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.
+
+#ifndef WEBKIT_GPU_WEBKIT_GPU_EXPORT_H_
+#define WEBKIT_GPU_WEBKIT_GPU_EXPORT_H_
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(WEBKIT_GPU_IMPLEMENTATION)
+#define WEBKIT_GPU_EXPORT __declspec(dllexport)
+#else
+#define WEBKIT_GPU_EXPORT __declspec(dllimport)
+#endif  // defined(WEBKIT_GPU_IMPLEMENTATION)
+
+#else // defined(WIN32)
+#if defined(WEBKIT_GPU_IMPLEMENTATION)
+#define WEBKIT_GPU_EXPORT __attribute__((visibility("default")))
+#else
+#define WEBKIT_GPU_EXPORT
+#endif
+#endif
+
+#else // defined(COMPONENT_BUILD)
+#define WEBKIT_GPU_EXPORT
+#endif
+
+#endif  // WEBKIT_GPU_WEBKIT_GPU_EXPORT_H_