Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLSharedResources.idl

Index: Source/core/html/canvas/WebGLSharedResources.idl
diff --git a/Source/core/html/canvas/WebGLCompressedTextureATC.idl b/Source/core/html/canvas/WebGLSharedResources.idl
similarity index 69%
copy from Source/core/html/canvas/WebGLCompressedTextureATC.idl
copy to Source/core/html/canvas/WebGLSharedResources.idl
index e627f217c217fdd3403aa76e4abcdfc78388d075..150a3bc0238437175e7e3cb8952f9103f5e56792 100644
--- a/Source/core/html/canvas/WebGLCompressedTextureATC.idl
+++ b/Source/core/html/canvas/WebGLSharedResources.idl
@@ -23,12 +23,20 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+typedef unsigned long GLenum;
+
 [
-    NoInterfaceObject,
     DoNotCheckConstants
-] interface WebGLCompressedTextureATC {
-    /* Compressed Texture Formats */
-    const unsigned long COMPRESSED_RGB_ATC_WEBGL                     = 0x8C92;
-    const unsigned long COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL     = 0x8C93;
-    const unsigned long COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL = 0x87EE;
+] interface WebGLSharedResources {
+    const GLenum READ_ONLY  = 0x0001;
+    const GLenum EXCLUSIVE  = 0x0004;
+
+    const GLenum READ_FRAMEBUFFER = 0x8CA8;
+    const GLenum DRAW_FRAMEBUFFER = 0x8CA9;
+
+    readonly attribute WebGLShareGroup group;
+
+    [StrictTypeChecking, RaisesException] long  acquireSharedResource(WebGLSharedObject object, GLenum mode, WebGLAcquireSharedResourceCallback callback);
+    [StrictTypeChecking, RaisesException] void  releaseSharedResource(WebGLSharedObject object);
+    [StrictTypeChecking] void                   cancelAcquireSharedResource(long id);
 };