you can use orion browser for iPad and iphone and you can also use it on your mac if you have and they sync also all your pasword and bookmark favorite website across all your apple devices i try it today and he work good.

I'm sorry but I don't think there is a way to create plugins for the chrome iOS application.

Because...

• The user has no way to organize these plugins in the application.
• The mobile app is very different from the full computer application, smaller, and doesn't need to have the capabilities of the full computer application.
• There isn't a way to adjust the browser settings.
• You can't download certain file types from a mobile browser.
• I think downloading these plugins to the device would be against apples policies, because there not approved by apple
• If it would ever work, google would have to offer them all in one application or have in app purchases
• Unless you jail-brake and download the full version chrome you won't be able to receive plugins on your iOS device
• A developer outside of Google can't communicate with Googles apps

There are free web browser tutorials out there, instead of creating a plugin for the mobile application, why not just create your own browser. This would allow you to make some awesome "plugin-type" tools.

Creating a mobile-browser application tutorials:

• 2 part tutorial with web view here and here.
• internet browser with a search bar video @youtube.com/.....