Revert "Use V8 implementation of ArrayBuffer in Blink."

Source/core/html/canvas/ArrayBuffer.idl

Index: Source/core/html/canvas/ArrayBuffer.idl
diff --git a/Source/core/page/WebKitPoint.idl b/Source/core/html/canvas/ArrayBuffer.idl
similarity index 86%
copy from Source/core/page/WebKitPoint.idl
copy to Source/core/html/canvas/ArrayBuffer.idl
index 6ac44cd16c319425e20c8783a02018b4c4b225dc..781bd900f8a39a80ad1cebcc81ed63b82a4e75be 100644
--- a/Source/core/page/WebKitPoint.idl
+++ b/Source/core/html/canvas/ArrayBuffer.idl
@@ -24,11 +24,10 @@
  */
 
 [
-    CustomConstructor,
-    CustomConstructor(float x, float y),
-    ImplementedAs=DOMPoint
-] interface WebKitPoint {
-    attribute float x;
-    attribute float y;
+    GlobalContext=Window&WorkerGlobalScope,
+    CustomConstructor(unsigned long length)
+] interface ArrayBuffer {
+    readonly attribute unsigned long byteLength;
+    ArrayBuffer slice(long begin, optional long end);
 };