API proposal for chrome.app.window to intercept all keys.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index eb24714e1cfc49cb4a892619214eac723f52ef1a..517880c3542e7cf5f3aa3c6c715c986de04449a5 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4504,6 +4504,16 @@ Make sure you do not expose any sensitive information.
       <message name="IDS_EXTENSION_PROMPT_WARNING_EXPERIENCE_SAMPLING_PRIVATE" desc="Permission string for Experience Sampling Private API.">
         Monitor when you take actions in Chrome
       </message>
+      <if expr="is_macosx">
+        <message name="IDS_EXTENSION_PROMPT_WARNING_INTERCEPT_ALL_KEYS" desc="Permission string for intercept all keyboard keys via packaged app extension APIs">
+        Read and change anything you type including task switching key like CMD+TAB
+      </message>
+      </if>
+      <if expr="not is_macosx">
+      <message name="IDS_EXTENSION_PROMPT_WARNING_INTERCEPT_ALL_KEYS" desc="Permission string for intercept all keyboard keys via packaged app extension APIs">
+        Read and change anything you type including task switching key like ALT+TAB
+      </message>
+      </if>
 
       <!-- Extension/App error messages -->
       <message name="IDS_EXTENSION_CANT_GET_ABSOLUTE_PATH" desc="Warning displayed in pack dialog when the absolute path to the extension directory can not be found.">