Updating Gamepad API to match latest spec

ppapi/shared_impl/ppb_gamepad_shared.cc

Index: ppapi/shared_impl/ppb_gamepad_shared.cc
diff --git a/ppapi/shared_impl/ppb_gamepad_shared.cc b/ppapi/shared_impl/ppb_gamepad_shared.cc
index 4f83b39956d14bf1e6e10c51adfcaf013726b1f3..c45494a00c1c2dd07b4bf9778350ddf583825c7b 100644
--- a/ppapi/shared_impl/ppb_gamepad_shared.cc
+++ b/ppapi/shared_impl/ppb_gamepad_shared.cc
@@ -20,15 +20,14 @@ void ConvertWebKitGamepadData(const WebKitGamepads& webkit_data,
                      id_size_does_not_match);
       COMPILE_ASSERT(sizeof(output_pad.axes) == sizeof(webkit_pad.axes),
                      axes_size_does_not_match);
-      COMPILE_ASSERT(sizeof(output_pad.buttons) == sizeof(webkit_pad.buttons),
-                     buttons_size_does_not_match);
       memcpy(output_pad.id, webkit_pad.id, sizeof(output_pad.id));
       output_pad.timestamp = webkit_pad.timestamp;
       output_pad.axes_length = webkit_pad.axes_length;
       memcpy(output_pad.axes, webkit_pad.axes, sizeof(output_pad.axes));
       output_pad.buttons_length = webkit_pad.buttons_length;
-      memcpy(
-          output_pad.buttons, webkit_pad.buttons, sizeof(output_pad.buttons));
+
+      for (unsigned j = 0; j < webkit_pad.buttons_length; ++j)
+        output_pad.buttons[j] = webkit_pad.buttons[j].value;
     }
   }
 }