Delete WebGamepads::length.

ppapi/shared_impl/ppb_gamepad_shared.h

Index: ppapi/shared_impl/ppb_gamepad_shared.h
diff --git a/ppapi/shared_impl/ppb_gamepad_shared.h b/ppapi/shared_impl/ppb_gamepad_shared.h
index 4a71d9645502a4f223a5c8dd6de70f70fcbf5761..577a13d838866128e1d0e9fdedff2acb9c991e24 100644
--- a/ppapi/shared_impl/ppb_gamepad_shared.h
+++ b/ppapi/shared_impl/ppb_gamepad_shared.h
@@ -101,9 +101,6 @@ struct WebKitGamepad {
 struct WebKitGamepads {
   static const size_t kItemsLengthCap = 4;
 
-  // Number of valid entries in the items array.
-  unsigned length;
-
   // Gamepad data for N separate gamepad devices.
   WebKitGamepad items[kItemsLengthCap];
 };