Stop compiling ColorChooserAura on Windows

It's not used on Windows anyway as there's platform-specific
implementation in chrome/browser/ui/views/color_chooser_win.cc.

Change-Id: Ic799890799f70141ae1e245e3a62df5cf707947c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2108141Reviewed-by: Dana Fried <dfried@chromium.org>
Commit-Queue: Tomasz Moniuszko <tmoniuszko@opera.com>
Cr-Commit-Position: refs/heads/master@{#752396}

chrome/browser/ui/BUILD.gn

@@ -3650,8 +3650,6 @@ jumbo_static_library("ui") {
       "views/apps/glass_app_window_frame_view_win.h",
       "views/apps/shaped_app_window_targeter.cc",
       "views/apps/shaped_app_window_targeter.h",
-      "views/color_chooser_aura.cc",
-      "views/color_chooser_aura.h",
       "views/dropdown_bar_host_aura.cc",
       "views/frame/browser_non_client_frame_view_factory_chromeos.cc",
       "views/ime/ime_window_frame_view.cc",
@@ -3678,6 +3676,13 @@ jumbo_static_library("ui") {
         "views/frame/desktop_browser_frame_aura.h",
       ]
     }
+
+    if (!is_win) {
+      sources += [
+        "views/color_chooser_aura.cc",
+        "views/color_chooser_aura.h",
+      ]
+    }
   }
 
   if (is_chromeos) {

chrome/browser/ui/views/color_chooser_aura.cc

@@ -58,7 +58,6 @@ ColorChooserAura* ColorChooserAura::Open(
   return new ColorChooserAura(web_contents, initial_color);
 }
 
-#if !defined(OS_WIN)
 namespace chrome {
 
 content::ColorChooser* ShowColorChooser(content::WebContents* web_contents,
@@ -67,4 +66,3 @@ content::ColorChooser* ShowColorChooser(content::WebContents* web_contents,
 }
 
 }  // namespace chrome
-#endif  // OS_WIN