Expose Gamepad API instance for Cardboard button

chrome/browser/android/vr_shell/vr_controller.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/android/vr_shell/vr_controller.h"
 
 #include <algorithm>
 #include <cmath>
 #include <utility>
 
@@ skipping 101 matching lines @@
   // Use orientation to rotate acceleration/gyro into seated space.
   vr::Mat4f pose_mat;
   vr::QuatToMatrix(pad.orientation, &pose_mat);
   const gvr::Vec3f& accel = controller_state_->GetAccel();
   const gvr::Vec3f& gyro = controller_state_->GetGyro();
   pad.accel =
       vr::MatrixVectorMul(pose_mat, gfx::Vector3dF(accel.x, accel.y, accel.z));
   pad.gyro =
       vr::MatrixVectorMul(pose_mat, gfx::Vector3dF(gyro.x, gyro.y, gyro.z));
 
-  pad.is_touching = controller_state_->IsTouching();
+  pad.is_controller_touching = controller_state_->IsTouching();
   pad.controller_button_pressed =
       controller_state_->GetButtonState(GVR_CONTROLLER_BUTTON_CLICK);
   pad.right_handed = handedness_ == GVR_CONTROLLER_RIGHT_HANDED;
 
   return pad;
 }
 
 bool VrController::IsTouching() {
   return controller_state_->IsTouching();
 }
@@ skipping 306 matching lines @@
 
   const gfx::Vector2dF& velocity = ScaleVector2d(displacement, (1 / duration));
 
   float weight = duration / (kRC + duration);
 
   overall_velocity_ = ScaleVector2d(overall_velocity_, (1 - weight)) +
                       ScaleVector2d(velocity, weight);
 }
 
 }  // namespace vr_shell