Inject default libraries to all targets in GN.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 8e7471a5a2afd938324c7b393c3b183435b2a996..4413c7e7633f787a48b1b4fc6f6e356ad473680d 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -705,8 +705,6 @@ component("base") {
     "//third_party/modp_b64",
   ]
 
-  libs = []
-
   if (!is_chromeos) {
     sources -= [
       "sys_info_chromeos.cc",
@@ -757,7 +755,6 @@ component("base") {
   } else if (!is_nacl) {
     # Non-Windows.
     deps += [ "//third_party/libevent" ]
-    libs += [ "dl" ]
   }
 
   # Mac.
@@ -768,31 +765,11 @@ component("base") {
       "strings/sys_string_conversions_posix.cc",
     ]
     deps += [ "//third_party/mach_override" ]
-    libs += [
-      "AppKit.framework",
-      "ApplicationServices.framework",
-      "Carbon.framework",
-      "CoreFoundation.framework",
-      "Foundation.framework",
-      "IOKit.framework",
-      "Security.framework",
-    ]
   } else {
     # Non-Mac.
     sources -= [ "files/file_path_watcher_kqueue.cc" ]
   }
 
-  # IOS.
-  if (is_ios) {
-    libs += [
-      "CoreFoundation.framework",
-      "CoreGraphics.framework",
-      "CoreText.framework",
-      "Foundation.framework",
-      "UIKit.framework",
-    ]
-  }
-
   # Linux.
   if (is_linux) {
     # TODO(brettw) these will need to be parameterized at some point.