[iOS] Add assert_no_deps to //build/config/ios/rules.gni "app" template.

build/config/ios/rules.gni

Index: build/config/ios/rules.gni
diff --git a/build/config/ios/rules.gni b/build/config/ios/rules.gni
index 5bf2bd7cd489357144fb94994b29b941368d595a..850559d4588243702bf53c96a0cb219844a309c1 100644
--- a/build/config/ios/rules.gni
+++ b/build/config/ios/rules.gni
@@ -111,6 +111,26 @@ template("app") {
       libs = []
     }
     libs += [ "UIKit.framework" ]
+
+    if (is_ios) {
+      assert_no_deps = [

[brettw, 2016/03/15 18:04:17]

I think we should forward this from the invoker to the executable target here
and then the app declaration itself can decide what it depends on.

+        # Those dependencies are conceptually bad on iOS and should never be
+        # added (they will never be supported).
+        "//cc/*",
+        "//content/*",
+        "//dbus/*",
+        "//ipc/*",
+        "//jingle/*",
+        "//media/*",
+        "//third_party/webrtc/*",
+        "//third_party/WebKit/*",
+
+        # Those dependencies are conceptually fine, but currently does not
+        # build on iOS. The exclusion will be removed when the dependencies
+        # are fixed.
+        "//mojo/edk/*",
+      ]
+    }
   }
 
   bundle_data(_bundle_data_executable) {