Add a chrome://webapks page.

components/webapks_ui_strings.grdp

Index: components/webapks_ui_strings.grdp
diff --git a/components/webapks_ui_strings.grdp b/components/webapks_ui_strings.grdp
new file mode 100644
index 0000000000000000000000000000000000000000..4e355f398a0276558993fbdab9eaabd2cf7eab1a
--- /dev/null
+++ b/components/webapks_ui_strings.grdp
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<grit-part>
+  <message name="IDS_WEBAPKS_UI_TITLE" desc="Title on the about:webapks page">

[pkotwicz, 2017/01/18 02:08:21]

chrome://webapks is an internal only debugging page like chrome://sync-internals
and does not need to be translated (Btw chrome://sync-internals is super cool)

That means that you don't need any of the fancy grd stuff and you can put the
strings right into the html file

+    About WebAPKs
+  </message>
+  <message name="IDS_WEBAPKS_UI_HEADER" desc="Header on the about:webapks page">
+    WebAPKs
+  </message>
+  <message name="IDS_WEBAPKS_UI_PACKAGE_NAME" desc="Label for the package name of a WebAPK">
+    Package name
+  </message>
+  <message name="IDS_WEBAPKS_UI_SHELL_APK_VERSION" desc="Label for the shell APK version of a WebAPK">
+    Shell APK version
+  </message>
+  <message name="IDS_WEBAPKS_UI_VERSION_CODE" desc="Label for the version code of a WebAPK">
+    Version code
+  </message>
+</grit-part>