Add support for fat build to "ios_framework_bundle" target.

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index 1c26c3f29012af6f22a4709c98c11ea97376a6b7..ae4896c44e1eff0ef816e0ad2f86bfcfdcffbd2c 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -889,7 +889,7 @@ if (is_win) {
   target(_dll_target_type, "chrome_dll") {
     visibility = [
       ":chrome_framework",
-      ":chrome_framework_shared_library",
+      ":chrome_framework_link_shared_library",

[Robert Sesek, 2016/07/12 23:57:16]

Why this name change? I think it may be a little confusing given that "+link"
exists and changes behavior. Similarly, if this comes up for iOS, "_lipo" will
be in the name, when "_shared_library" is probably cleaner there, too. Maybe
just the thin shared_library targets should have a "_arch" in the name instead,
and leave the pre-bundled shared_library output named as _shared_library.

[sdefresne, 2016/07/13 10:57:50]

Done.

     ]
 
     sources = [
@@ -1279,7 +1279,7 @@ if (is_chrome_branded) {
     if (is_mac) {
       visibility += [
         ":chrome_framework",
-        ":chrome_framework_shared_library",
+        ":chrome_framework_link_shared_library",
       ]
     }