fix content build on !linux && use_x11

content/content_common.gypi

Index: content/content_common.gypi
diff --git a/content/content_common.gypi b/content/content_common.gypi
index 94716890cce735386ed295f379b68013ad184234..57d2d07e33a345339641ad286e0861be130e7e8b 100644
--- a/content/content_common.gypi
+++ b/content/content_common.gypi
@@ -294,14 +294,6 @@
       'dependencies': [
         '../build/linux/system.gyp:pangocairo',
       ],
-    }],
-    ['use_x11 == 1 and target_arch != "arm"', {
-      'sources': [
-        'common/gpu/x_util.cc',
-        'common/gpu/x_util.h',
-      ],
-    }],
-    ['OS=="linux"', {
       'include_dirs': [
         '<(DEPTH)/third_party/angle/include',
       ],
@@ -311,6 +303,12 @@
         ],
       },
     }],
+    ['use_x11 == 1 and target_arch != "arm"', {
+      'sources': [
+        'common/gpu/x_util.cc',
+        'common/gpu/x_util.h',
+      ],
+    }],
     ['enable_gpu==1', {
       'dependencies': [
         '../gpu/gpu.gyp:command_buffer_service',