VR: Update header to Keyboard API v2

Bug: 811494
Change-Id: I4db9912240ac54e1883259d1981e6254b3600818
Reviewed-on: https://chromium-review.googlesource.com/935472Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Commit-Queue: Yash Malik <ymalik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538926}

third_party/gvr-android-keyboard/README.chromium

 Name: GVR Keyboard
 Short Name: gvr-android-keyboard
 URL: NA
-Version: 0
+Version: 2
 Date: 2017-11-14
 License: Apache 2.0
 License File: LICENSE

third_party/gvr-android-keyboard/src/libraries/headers/vr/gvr/capi/include/gvr_keyboard.h

@@ -90,6 +90,8 @@ typedef enum {
   GVR_KEYBOARD_MODE_DEFAULT = 0,
   /// Keyboard layout for inputing numbers.
   GVR_KEYBOARD_MODE_NUMERIC = 1,
+  /// Keyboard layout for inputing password.
+  GVR_KEYBOARD_MODE_PASSWORD = 2,
 } gvr_keyboard_input_mode;
 
 typedef struct gvr_mat4f gvr_mat4f;
@@ -184,6 +186,15 @@ bool gvr_keyboard_update_controller_ray(gvr_keyboard_context* context,
                                         const gvr_vec3f* end,
                                         gvr_vec3f* hit);
 
+/// Updates the touch state of the controller.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param touched Whether touch pad is being touched.
+/// @param pos Touch position.
+void gvr_keyboard_update_controller_touch(gvr_keyboard_context* context,
+                                          bool touched,
+                                          const gvr_vec2f* pos);
+
 /// Gets the contents of the keyboard's text field.
 ///
 /// @param context A pointer to the keyboard's context.