Export ui/views library.
Export symbols of WebView(ui/views/controls/webview).
Also include webview in the dependencies.
Add the CONTENT_IMPLEMENTATION definetion.

For targets that uses content module but is not part of it (for example
the webview target), we need to define CONTENT_IMPLEMENTATION to fix
linking errors.
web_dialogs is a dependency of webview, export its symbols.
Build the views module as static library.
Don't make views-specific defines global.
Use chromiumviews as the name for views module.
Merge pull request #21 from brightray/ui_views

  Export ui/views library