Observe OnExtensionLoaded to trigger update of chrome.commands keybindings for component extensions.

chrome/browser/extensions/extension_keybinding_registry.cc

Index: chrome/browser/extensions/extension_keybinding_registry.cc
diff --git a/chrome/browser/extensions/extension_keybinding_registry.cc b/chrome/browser/extensions/extension_keybinding_registry.cc
index 3b239420ad39666d9dedf6be153d756104c48c69..22837a82a1b36a0831e0030efa77d2e29a56bb8c 100644
--- a/chrome/browser/extensions/extension_keybinding_registry.cc
+++ b/chrome/browser/extensions/extension_keybinding_registry.cc
@@ -197,10 +197,17 @@ void ExtensionKeybindingRegistry::Observe(
         return;
 
       if (ExtensionMatchesFilter(extension)) {
-        if (type == extensions::NOTIFICATION_EXTENSION_COMMAND_ADDED)
+        if (type == extensions::NOTIFICATION_EXTENSION_COMMAND_ADDED) {
+          // Component extensions triggers OnExtensionLoaded for extension
+          // installs as well as loads. This can cause adding of multiple key
+          // targets.
+          if (extension->location() == Manifest::COMPONENT)
+            return;
+
           AddExtensionKeybindings(extension, payload->command_name);
-        else
+        } else {
           RemoveExtensionKeybinding(extension, payload->command_name);
+        }
       }
       break;
     }