EXO: Conditionally build ChromeOS Wayland protocols

Moved protocols under is_chromeos for selective compilation. These
protocols have ChromeOS dependencies and would not compile on other
platforms. This is needed for eventual compilation of exo on Chromecast.

Bug: 896710
Test: Run exo_unittests
Change-Id: Id30ebdc8bf8338cba9e21a87350ab206b6d6057c
Reviewed-on: https://chromium-review.googlesource.com/c/1328566Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Commit-Queue: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611729}

components/exo/wayland/BUILD.gn

@@ -41,46 +41,51 @@ source_set("wayland") {
     "wayland_display_output.h",
     "wayland_input_delegate.cc",
     "wayland_input_delegate.h",
-    "wayland_keyboard_delegate.cc",
-    "wayland_keyboard_delegate.h",
-    "wayland_pointer_delegate.cc",
-    "wayland_pointer_delegate.h",
     "wayland_touch_delegate.cc",
     "wayland_touch_delegate.h",
     "wl_output.cc",
     "wl_output.h",
     "wl_seat.cc",
     "wl_seat.h",
-    "wl_shell.cc",
-    "wl_shell.h",
-    "zaura_shell.cc",
-    "zaura_shell.h",
-    "zcr_cursor_shapes.cc",
-    "zcr_cursor_shapes.h",
-    "zcr_gaming_input.cc",
-    "zcr_gaming_input.h",
-    "zcr_keyboard_configuration.cc",
-    "zcr_keyboard_configuration.h",
-    "zcr_keyboard_extension.cc",
-    "zcr_keyboard_extension.h",
-    "zcr_notification_shell.cc",
-    "zcr_notification_shell.h",
-    "zcr_remote_shell.cc",
-    "zcr_remote_shell.h",
-    "zcr_stylus_tools.cc",
-    "zcr_stylus_tools.h",
-    "zwp_input_timestamps_manager.cc",
-    "zwp_input_timestamps_manager.h",
-    "zwp_pointer_gestures.cc",
-    "zwp_pointer_gestures.h",
-    "zwp_text_input_manager.cc",
-    "zwp_text_input_manager.h",
-    "zxdg_shell.cc",
-    "zxdg_shell.h",
   ]
 
   defines = [ "EXO_IMPLEMENTATION" ]
 
+  if (is_chromeos) {
+    sources += [
+      "wayland_keyboard_delegate.cc",
+      "wayland_keyboard_delegate.h",
+      "wayland_pointer_delegate.cc",
+      "wayland_pointer_delegate.h",
+      "wl_shell.cc",
+      "wl_shell.h",
+      "zaura_shell.cc",
+      "zaura_shell.h",
+      "zcr_cursor_shapes.cc",
+      "zcr_cursor_shapes.h",
+      "zcr_gaming_input.cc",
+      "zcr_gaming_input.h",
+      "zcr_keyboard_configuration.cc",
+      "zcr_keyboard_configuration.h",
+      "zcr_keyboard_extension.cc",
+      "zcr_keyboard_extension.h",
+      "zcr_notification_shell.cc",
+      "zcr_notification_shell.h",
+      "zcr_remote_shell.cc",
+      "zcr_remote_shell.h",
+      "zcr_stylus_tools.cc",
+      "zcr_stylus_tools.h",
+      "zwp_input_timestamps_manager.cc",
+      "zwp_input_timestamps_manager.h",
+      "zwp_pointer_gestures.cc",
+      "zwp_pointer_gestures.h",
+      "zwp_text_input_manager.cc",
+      "zwp_text_input_manager.h",
+      "zxdg_shell.cc",
+      "zxdg_shell.h",
+    ]
+  }
+
   deps = [
     "//base",
     "//components/exo",