Use the new java_cpp_enum rule in content.

content/browser/gamepad/gamepad_standard_mappings.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_
 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_
 
 #include "base/strings/string_piece.h"
 #include "content/common/gamepad_hardware_buffer.h"
 
 namespace content {
 
 typedef void (*GamepadStandardMappingFunction)(
     const blink::WebGamepad& original,
     blink::WebGamepad* mapped);
 
 GamepadStandardMappingFunction GetGamepadStandardMappingFunction(
     const base::StringPiece& vendor_id,
     const base::StringPiece& product_id);
 
 // This defines our canonical mapping order for gamepad-like devices. If these
 // items cannot all be satisfied, it is a case-by-case judgement as to whether
 // it is better to leave the device unmapped, or to partially map it. In
 // general, err towards leaving it *unmapped* so that content can handle
 // appropriately.
 
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.content.browser.input
+// GENERATED_JAVA_PREFIX_TO_STRIP: BUTTON_INDEX_
 enum CanonicalButtonIndex {
-  kButtonPrimary,
-  kButtonSecondary,
-  kButtonTertiary,
-  kButtonQuaternary,
-  kButtonLeftShoulder,
-  kButtonRightShoulder,
-  kButtonLeftTrigger,
-  kButtonRightTrigger,
-  kButtonBackSelect,
-  kButtonStart,
-  kButtonLeftThumbstick,
-  kButtonRightThumbstick,
-  kButtonDpadUp,
-  kButtonDpadDown,
-  kButtonDpadLeft,
-  kButtonDpadRight,
-  kButtonMeta,
-  kNumButtons
+  BUTTON_INDEX_PRIMARY,
+  BUTTON_INDEX_SECONDARY,
+  BUTTON_INDEX_TERTIARY,
+  BUTTON_INDEX_QUATERNARY,
+  BUTTON_INDEX_LEFT_SHOULDER,
+  BUTTON_INDEX_RIGHT_SHOULDER,
+  BUTTON_INDEX_LEFT_TRIGGER,
+  BUTTON_INDEX_RIGHT_TRIGGER,
+  BUTTON_INDEX_BACK_SELECT,
+  BUTTON_INDEX_START,
+  BUTTON_INDEX_LEFT_THUMBSTICK,
+  BUTTON_INDEX_RIGHT_THUMBSTICK,
+  BUTTON_INDEX_DPAD_UP,
+  BUTTON_INDEX_DPAD_DOWN,
+  BUTTON_INDEX_DPAD_LEFT,
+  BUTTON_INDEX_DPAD_RIGHT,
+  BUTTON_INDEX_META,
+  BUTTON_INDEX_COUNT
 };
 
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.content.browser.input
+// GENERATED_JAVA_PREFIX_TO_STRIP: AXIS_INDEX_
 enum CanonicalAxisIndex {
-  kAxisLeftStickX,
-  kAxisLeftStickY,
-  kAxisRightStickX,
-  kAxisRightStickY,
-  kNumAxes
+  AXIS_INDEX_LEFT_STICK_X,
+  AXIS_INDEX_LEFT_STICK_Y,
+  AXIS_INDEX_RIGHT_STICK_X,
+  AXIS_INDEX_RIGHT_STICK_Y,
+  AXIS_INDEX_COUNT
 };
 
 // Matches XInput's trigger deadzone
 const float kDefaultButtonPressedThreshold = 30.f/255.f;
 
 // Common mapping functions
 blink::WebGamepadButton AxisToButton(float input);
 blink::WebGamepadButton AxisNegativeAsButton(float input);
 blink::WebGamepadButton AxisPositiveAsButton(float input);
 blink::WebGamepadButton ButtonFromButtonAndAxis(
     blink::WebGamepadButton button, float axis);
 blink::WebGamepadButton NullButton();
 void DpadFromAxis(blink::WebGamepad* mapped, float dir);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_