[ios] Move NativeAppLauncher upstream

ios/chrome/app/strings/ios_strings.grd

Index: ios/chrome/app/strings/ios_strings.grd
diff --git a/ios/chrome/app/strings/ios_strings.grd b/ios/chrome/app/strings/ios_strings.grd
index 4b969201b5524fa61c83aa5ae1705cac5445975b..2e1920a65f7568a79b88df9260941d76cfd777b6 100644
--- a/ios/chrome/app/strings/ios_strings.grd
+++ b/ios/chrome/app/strings/ios_strings.grd
@@ -263,6 +263,25 @@ brand. [Length: 70em]">
         Enables the browser task scheduler to dispatch tasks instead of the existing worker pools. The browser task scheduler will only be used if variation parameters are available.
       </message>
 
+      <!-- Native App Launcher -->
+      <message name="IDS_APP_LAUNCHER_OPEN_ONCE_BUTTON_IOS" desc="Label of a button to choose to launch an application once, as opposed to always. [Length: 12em] [iOS only]">

[sdefresne, 2016/11/17 06:24:26]

The strings identifier should be changed from IDS_FOO to IDS_IOS_FOO to:
1. make it obvious they are iOS only when looking at the code without checking
in which file they are defined,
2. avoid collisions with the same strings defined downstream (at the point of
upstreaming, later the downstream version should be removed),
3. keep consistent with the rest of the file.

To answer rohitrao question, for upstreaming strings, we change id, upstream
them, change code downstream to use the new version, and then remove the
downstream string. This can be done in two CLs (one for landing the strings
upstream, one to use them downstream and remove the old strings).

The same process can be used for other resources (images, ...).

[sczs1, 2016/11/18 23:42:48]

Thanks for the detailed explanation. Done.

+          Just once
+      </message>
+      <message name="IDS_APP_LAUNCHER_OPEN_ALWAYS_BUTTON_IOS" desc="Label of a button to choose to launch an application always, as opposed to once. [Length: 12em] [iOS only]">
+        Always
+      </message>
+      <message name="IDS_APP_LAUNCHER_OPEN_IN_LABEL_IOS" desc="Label in the infobar to launch an application. [Length: 20em] [iOS only]">
+        Open in <ph name="APP_NAME">$1<ex>Google Maps</ex></ph>
+      </message>
+      <message name="IDS_APP_LAUNCHER_OPEN_IN_APP_QUESTION_MESSAGE_IOS" desc="Message in the infobar asking the user if they want to open the current page in a google app. [Length: 40em] [iOS only]">
+        Open this page in the <ph name="APP_NAME">$1<ex>Google Maps</ex></ph> app?
+      </message>
+      <message name="IDS_APP_LAUNCHER_OPEN_APP_BUTTON_LABEL_IOS" desc="Label of a button to open an application. [Length: 10em] [iOS only]">
+        Open
+      </message>
+      <message name="IDS_APP_LAUNCHER_INSTALL_APP_BUTTON_LABEL_IOS" desc="Label of a button to install an application. [Length: 10em] [iOS only]">
+        Install
+        </message>      
     </messages>
   </release>
 </grit>