Minor fixes to junit and robolectric BUILD.gn files.

third_party/robolectric/BUILD.gn

Index: third_party/robolectric/BUILD.gn
diff --git a/third_party/robolectric/BUILD.gn b/third_party/robolectric/BUILD.gn
index 07613acb35abac4e45bfd8e8b74e085ee31b174b..211c3d63b21b9dd221af30ffe55384d2b6e9a2d3 100644
--- a/third_party/robolectric/BUILD.gn
+++ b/third_party/robolectric/BUILD.gn
@@ -6,19 +6,16 @@ import("//build/config/android/rules.gni")
 
 # GYP: //third_party/robolectric/robolectric.gyp:android-all-4.3_r2-robolectric-0
 java_prebuilt("android-all-4.3_r2-robolectric-0") {
-  visibility = [ ":*" ]
   jar_path = "lib/android-all-4.3_r2-robolectric-0.jar"
 }
 
 # GYP: //third_party/robolectric/robolectric.gyp:tagsoup-1.2
 java_prebuilt("tagsoup-1.2") {
-  visibility = [ ":*" ]
   jar_path = "lib/tagsoup-1.2.jar"
 }
 
 # GYP: //third_party/robolectric/robolectric.gyp:json-20080701
 java_prebuilt("json-20080701") {
-  visibility = [ ":*" ]
   jar_path = "lib/json-20080701.jar"
 }