Update Gamepad API to match the latest specification

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..ea742b6444b12723236beda387f1b0f21fe53bfd 100644
--- a/ppapi/api/ppb_gamepad.idl
+++ b/ppapi/api/ppb_gamepad.idl
@@ -11,13 +11,14 @@
 [generate_thunk]
 
 label Chrome {
-  M19 = 1.0
+  M19 = 1.0,
+  M36 = 1.1
 };
 
 /**
  * The data for one gamepad device.
  */
-[assert_size(472)]
+[assert_size(672)]
 struct PP_GamepadSampleData {
     /**
      * Number of valid elements in the |axes| array.
@@ -28,9 +29,17 @@ struct PP_GamepadSampleData {
      * Normalized values for the axes, indices valid up to |axes_length|-1. Axis
      * values range from -1..1, and are in order of "importance".
      */
+    [version = 1.0]
     float_t[16] axes;
 
     /**
+     * Normalized values for the axes, indices valid up to |axes_length|-1. Axis
+     * values range from -1..1, and are in order of "importance".
+     */
+    [version = 1.1]
+    double_t[16] axes;
+
+    /**
      * Number of valid elements in the |buttons| array.
      */
     uint32_t buttons_length;
@@ -39,9 +48,17 @@ 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.
      */
+    [version = 1.0]
     float_t[32] buttons;
 
     /**
+     * Normalized values for the buttons, indices valid up to |buttons_length|
+     * - 1. Button values range from 0..1, and are in order of importance.
+     */
+    [version = 1.1]
+    double_t[32] buttons;
+
+    /**
      * Monotonically increasing value that is incremented when the data have
      * been updated.
      */
@@ -65,7 +82,7 @@ struct PP_GamepadSampleData {
 /**
  * The data for all gamepads connected to the system.
  */
-[assert_size(1896)]
+[assert_size(2696)]
 struct PP_GamepadsSampleData {
     /**
      * Number of valid elements in the |items| array.