Use the new java_cpp_enum rule in content.

content/browser/gamepad/gamepad_standard_mappings.cc

 // Copyright 2014 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 "content/browser/gamepad/gamepad_standard_mappings.h"
 
 namespace content {
 
 blink::WebGamepadButton AxisToButton(float input) {
   float value = (input + 1.f) / 2.f;
@@ skipping 33 matching lines @@
   // increases clockwise to 1, which is up + left. It's set to a large (> 1.f)
   // number when nothing is depressed, except on start up, sometimes it's 0.0
   // for no data, rather than the large number.
   if (dir != 0.0f) {
     up = (dir >= -1.f && dir < -0.7f) || (dir >= .95f && dir <= 1.f);
     right = dir >= -.75f && dir < -.1f;
     down = dir >= -.2f && dir < .45f;
     left = dir >= .4f && dir <= 1.f;
   }
 
-  mapped->buttons[kButtonDpadUp].pressed = up;
-  mapped->buttons[kButtonDpadUp].value = up ? 1.f : 0.f;
-  mapped->buttons[kButtonDpadRight].pressed = right;
-  mapped->buttons[kButtonDpadRight].value = right ? 1.f : 0.f;
-  mapped->buttons[kButtonDpadDown].pressed = down;
-  mapped->buttons[kButtonDpadDown].value = down ? 1.f : 0.f;
-  mapped->buttons[kButtonDpadLeft].pressed = left;
-  mapped->buttons[kButtonDpadLeft].value = left ? 1.f : 0.f;
+  mapped->buttons[BUTTON_INDEX_DPAD_UP].pressed = up;
+  mapped->buttons[BUTTON_INDEX_DPAD_UP].value = up ? 1.f : 0.f;
+  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT].pressed = right;
+  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT].value = right ? 1.f : 0.f;
+  mapped->buttons[BUTTON_INDEX_DPAD_DOWN].pressed = down;
+  mapped->buttons[BUTTON_INDEX_DPAD_DOWN].value = down ? 1.f : 0.f;
+  mapped->buttons[BUTTON_INDEX_DPAD_LEFT].pressed = left;
+  mapped->buttons[BUTTON_INDEX_DPAD_LEFT].value = left ? 1.f : 0.f;
 }
 
 }  // namespace content