changed browser api to return pages that can be acted on, not strictly contents

browser.go

@@ -5,23 +5,8 @@ import (
 	"io"
 )
 
-type ScreenshotStyle string
-
-const (
-	ScreenshotStyleFullPage ScreenshotStyle = "full"
-	ScreenshotStyleViewport ScreenshotStyle = "viewport"
-)
-
-type ScreenshotOptions struct {
-	Style  ScreenshotStyle
-	Width  int
-	Height int
-}
-
 type Browser interface {
 	io.Closer
 
-	Open(ctx context.Context, url string) (Source, error)
-	Screenshot(ctx context.Context, url string, opts ScreenshotOptions) ([]byte, error)
-	OpenAndScreenshot(ctx context.Context, url string, opts ScreenshotOptions) (Source, []byte, error)
+	Open(ctx context.Context, url string) (Document, error)
 }