Start to unwind references to iOS in //content

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index f6a27e6bd14d4c580306dceab9c0744fcda763be..6f2f6094d86591cd2036b7e7a86c06ad89df36ac 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -180,7 +180,7 @@ source_set("browser") {
   }
 
   # TODO(GYP)
-  #   ['OS!="ios" and chrome_multiple_dll!=1', {
+  #   [chrome_multiple_dll!=1', {
   #     'dependencies': [
   #       '../third_party/WebKit/public/blink.gyp:blink',
   #     ],
@@ -499,13 +499,6 @@ source_set("browser") {
     deps += [ "//ui/compositor" ]
   }
 
-  if (!is_ios) {
-    sources += [
-      "compositor/surface_utils.cc",
-      "compositor/surface_utils.h",
-    ]
-  }
-
   if (enable_web_speech) {
     deps += [ "//third_party/flac" ]
   }