Updating Gamepad API to match latest spec

ppapi/api/ppb_gamepad.idl

Index: ppapi/api/ppb_gamepad.idl
diff --git a/ppapi/api/ppb_gamepad.idl b/ppapi/api/ppb_gamepad.idl
index 1552fd67d7101881800ae992b129e086b1aaa6e6..d3452b991bc38566604367a00e2da5e112ed6551 100644
--- a/ppapi/api/ppb_gamepad.idl
+++ b/ppapi/api/ppb_gamepad.idl
@@ -15,9 +15,25 @@ label Chrome {
 };
 
 /**
+ * The data for one gamepad button.
+ */
+[assert_size(8)]
+struct PP_GamepadButtonSampleData {
+    /**
+     * Is the button pressed?
+     */
+    PP_Bool pressed;
+
+    /**
+     * Normalized button value, in the range [0..1].
+     */
+    float_t value;
+};
+
+/**
  * The data for one gamepad device.
  */
-[assert_size(472)]
+[assert_size(632)]
 struct PP_GamepadSampleData {
     /**
      * Number of valid elements in the |axes| array.
@@ -39,7 +55,7 @@ struct PP_GamepadSampleData {
      * Normalized values for the buttons, indices valid up to |buttons_length|
      * - 1. Button values range from 0..1, and are in order of importance.
      */
-    float_t[32] buttons;
+    PP_GamepadButtonSampleData[32] buttons;
 
     /**
      * Monotonically increasing value that is incremented when the data have
@@ -53,6 +69,11 @@ struct PP_GamepadSampleData {
     uint16_t[128] id;
 
     /**
+     * Mapping type (for example "standard")
+     */
+    uint16_t[16] mapping;
+
+    /**
      * Is there a gamepad connected at this index? If this is false, no other
      * data in this structure is valid.
      */
@@ -65,7 +86,7 @@ struct PP_GamepadSampleData {
 /**
  * The data for all gamepads connected to the system.
  */
-[assert_size(1896)]
+[assert_size(2536)]
 struct PP_GamepadsSampleData {
     /**
      * Number of valid elements in the |items| array.