java/com/tailscale,cmd/tailscale: remove webview signin

Adjust the Custom Tabs browser color to match the app header while
here.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

android/src/main/java/com/tailscale/ipn/Peer.java

@@ -73,53 +73,16 @@ public class Peer extends Fragment {
 		}
 	}
 
-	public void showURLActionView(String url) {
-		Intent i = new Intent(Intent.ACTION_VIEW);
-		i.setData(Uri.parse(url));
-		startActivity(i);
-	}
-
-	public void showURLCustomTabs(String url) {
+	void showURL(String url) {
 		CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
+		int headerColor = 0xff496495;
+		builder.setToolbarColor(headerColor);
 		CustomTabsIntent intent = builder.build();
 		intent.launchUrl(getActivity(), Uri.parse(url));
 	}
 
-	public void showURLWebView(String url) {
-		DialogFragment f = new WebViewFragment();
-		Bundle args = new Bundle();
-		args.putString("url", url);
-		f.setArguments(args);
-		f.show(getFragmentManager(), "urldialog");
-	}
-
 	private native void fragmentCreated();
 	private native void fragmentDestroyed();
 	private native void onSignin();
 	private native void onVPNPrepared();
-
-	public static class WebViewFragment extends DialogFragment {
-		@Override public Dialog onCreateDialog(Bundle savedInstanceState) {
-			String url = getArguments().getString("url");
-			AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-			WebView wv = new WebView(builder.getContext()) {
-				@Override public boolean onCheckIsTextEditor() {
-					// Force the soft keyboard to appear when a text
-					// input is focused.
-					return true;
-				}
-			};
-			wv.setFocusable(true);
-			wv.setFocusableInTouchMode(true);
-			wv.getSettings().setJavaScriptEnabled(true);
-			// Work around Google OAuth refusing to work in embedded
-			// browsers.
-			final String USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:61.0) Gecko/20100101 Firefox/61.0";
-			wv.getSettings().setUserAgentString(USER_AGENT);
-			wv.setWebViewClient(new WebViewClient() {
-			});
-			wv.loadUrl(url);
-			return builder.setView(wv).create();
-		}
-	}
 }

cmd/tailscale/main.go

@@ -579,7 +579,7 @@ func (a *App) processUIEvents(w *app.Window, events []UIEvent, peer jni.Object,
 func (a *App) browseToURL(peer jni.Object, url string) {
 	err := jni.Do(a.jvm, func(env jni.Env) error {
 		jurl := jni.JavaString(env, url)
-		return a.callVoidMethod(peer, "showURLCustomTabs", "(Ljava/lang/String;)V", jni.Value(jurl))
+		return a.callVoidMethod(peer, "showURL", "(Ljava/lang/String;)V", jni.Value(jurl))
 	})
 	if err != nil {
 		fatalErr(err)