exo: gamepad: Send raw scancode to ARC

This CL modifies exo to send raw gamepad scancode to ARC when
ExoRawGamepadInfo is enabled. ARC can identify if it's raw scancode
by whether the gamepad was initialized by gamepad_added or
gamepad_added_with_device_info.

Previously, Exo was sending Web Gamepad keycode to ARC, but this will be
deprecated as a part of the effort to improve ARC Gampad compatibility.
Design doc: go/arc-improved-gamepad

TEST=manual(--enable-features=ExoRawGamepadInfo to /etc/chrome_dev.conf)
BUG=b:130597086

Change-Id: Ied4da69655623a243b9e1caa681212138d46918e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1612857Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661276}

components/exo/gamepad_delegate.h

@@ -15,11 +15,14 @@ class GamepadDelegate {
 
   // Called when the user moved an axis of the gamepad. Valid axes are defined
   // by the W3C 'standard gamepad' specification.
-  virtual void OnAxis(int axis, double value) = 0;
+  virtual void OnAxis(int axis, int raw_axis, double value) = 0;
 
   // Called when the user pressed or moved a button of the gamepad.
   // Valid buttons are defined by the W3C 'standard gamepad' specification.
-  virtual void OnButton(int button, bool pressed, double value) = 0;
+  virtual void OnButton(int button,
+                        int raw_button,
+                        bool pressed,
+                        double value) = 0;
 
   // Called after all gamepad information of this frame has been set and the
   // client should evaluate the updated state.

components/exo/gaming_seat.cc

@@ -97,10 +97,11 @@ void GamingSeat::OnGamepadEvent(const ui::GamepadEvent& event) {
 
   switch (event.type()) {
     case ui::GamepadEventType::BUTTON:
-      it->second->OnButton(event.code(), event.value(), event.value());
+      it->second->OnButton(event.code(), event.raw_code(), event.value(),
+                           event.value());
       break;
     case ui::GamepadEventType::AXIS:
-      it->second->OnAxis(event.code(), event.value());
+      it->second->OnAxis(event.code(), event.raw_code(), event.value());
       break;
     case ui::GamepadEventType::FRAME:
       it->second->OnFrame();

components/exo/gaming_seat_unittest.cc

@@ -37,8 +37,8 @@ class MockGamepadDelegate : public GamepadDelegate {
 
   // Overridden from GamepadDelegate:
   MOCK_METHOD0(OnRemoved, void());
-  MOCK_METHOD2(OnAxis, void(int, double));
-  MOCK_METHOD3(OnButton, void(int, bool, double));
+  MOCK_METHOD3(OnAxis, void(int, int, double));
+  MOCK_METHOD4(OnButton, void(int, int, bool, double));
   MOCK_METHOD0(OnFrame, void());
 };
 

components/exo/wayland/zcr_gaming_input.cc

@@ -69,21 +69,28 @@ class WaylandGamepadDelegate : public GamepadDelegate {
     wl_resource_set_user_data(gamepad_resource_, nullptr);
     delete this;
   }
-  void OnAxis(int axis, double value) override {
+  void OnAxis(int axis, int raw_axis, double value) override {
     if (!gamepad_resource_) {
       return;
     }
+    // TODO(tetsui): Send raw axis index when kRawGamepadInfoFeature is enabled.
     zcr_gamepad_v2_send_axis(gamepad_resource_, NowInMilliseconds(), axis,
                              wl_fixed_from_double(value));
   }
-  void OnButton(int button, bool pressed, double value) override {
+  void OnButton(int button,
+                int raw_button,
+                bool pressed,
+                double value) override {
     if (!gamepad_resource_) {
       return;
     }
     uint32_t state = pressed ? ZCR_GAMEPAD_V2_BUTTON_STATE_PRESSED
                              : ZCR_GAMEPAD_V2_BUTTON_STATE_RELEASED;
-    zcr_gamepad_v2_send_button(gamepad_resource_, NowInMilliseconds(), button,
-                               state, wl_fixed_from_double(value));
+    zcr_gamepad_v2_send_button(
+        gamepad_resource_, NowInMilliseconds(),
+        base::FeatureList::IsEnabled(kRawGamepadInfoFeature) ? raw_button
+                                                             : button,
+        state, wl_fixed_from_double(value));
   }
   void OnFrame() override {
     if (!gamepad_resource_) {