Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLContextAttributes.cpp

Index: Source/core/html/canvas/WebGLContextAttributes.cpp
diff --git a/Source/core/html/canvas/WebGLContextAttributes.cpp b/Source/core/html/canvas/WebGLContextAttributes.cpp
index a28e4cf20c25429ca6b5f8a0c0c02627405a96c3..55786cf3b1521433f321e5bee7c82b62a68d747e 100644
--- a/Source/core/html/canvas/WebGLContextAttributes.cpp
+++ b/Source/core/html/canvas/WebGLContextAttributes.cpp
@@ -27,6 +27,7 @@
 #include "config.h"
 
 #include "core/html/canvas/WebGLContextAttributes.h"
+#include "core/html/canvas/WebGLShareGroup.h"
 
 namespace WebCore {
 
@@ -122,4 +123,14 @@ GraphicsContext3D::Attributes WebGLContextAttributes::attributes() const
     return m_attrs;
 }
 
+PassRefPtr<WebGLShareGroup> WebGLContextAttributes::group() const
+{
+    return m_shareGroup;
+}
+
+void WebGLContextAttributes::setGroup(PassRefPtr<WebGLShareGroup> group)
+{
+    m_shareGroup = group;
+}
+
 } // namespace WebCore