Added Hand attribute to Gamepad

third_party/WebKit/public/platform/WebGamepad.h

Index: third_party/WebKit/public/platform/WebGamepad.h
diff --git a/third_party/WebKit/public/platform/WebGamepad.h b/third_party/WebKit/public/platform/WebGamepad.h
index 7d9dda556c6a58e9bad76c375f06edd8b1ab59a0..cddc011653c3eb156fa237477ee492c0165753b2 100644
--- a/third_party/WebKit/public/platform/WebGamepad.h
+++ b/third_party/WebKit/public/platform/WebGamepad.h
@@ -91,6 +91,12 @@ public:
     WebGamepadVector linearAcceleration;
 };
 
+enum WebGamepadHand {
+    GamepadHandNone = 0,
+    GamepadHandLeft = 1,
+    GamepadHandRight = 2
+};
+
 // This structure is intentionally POD and fixed size so that it can be shared
 // memory between hardware polling threads and the rest of the browser. See
 // also WebGamepads.h.
@@ -137,9 +143,9 @@ public:
     WebUChar mapping[mappingLengthCap];
 
     WebGamepadPose pose;
-};
 
-static_assert(sizeof(WebGamepad) == 838, "WebGamepad has wrong size");
+    WebGamepadHand hand;
+};
 
 #pragma pack(pop)