ExtensionFlags    547 Source/core/html/canvas/WebGLRenderingContextBase.h         ExtensionTracker(ExtensionFlags flags, const char* const* prefixes)
ExtensionFlags    592 Source/core/html/canvas/WebGLRenderingContextBase.h         TypedExtensionTracker(RefPtr<T>& extensionField, ExtensionFlags flags, const char* const* prefixes)
ExtensionFlags    647 Source/core/html/canvas/WebGLRenderingContextBase.h     void registerExtension(RefPtr<T>& extensionPtr, ExtensionFlags flags = ApprovedExtension, const char* const* prefixes = 0)