Use 'frog' in apidoc. Also fix broken dependencies.

dart/lib/dartdoc/dartdoc.dart

Index: dart/lib/dartdoc/dartdoc.dart
diff --git a/dart/lib/dartdoc/dartdoc.dart b/dart/lib/dartdoc/dartdoc.dart
index 57191283f9718f3c214726e17a676fc2e7f09cf6..88a6c22ba3baa8e07bca7775b612c5a454163ded 100644
--- a/dart/lib/dartdoc/dartdoc.dart
+++ b/dart/lib/dartdoc/dartdoc.dart
@@ -175,17 +175,27 @@ void copyFiles(String from, String to) {
  */
 void compileScript(String compilerPath, String libDir,
     String dartPath, String jsPath) {
-  final process = new Process.start(compilerPath, [
-    '--libdir=$libDir', '--out=$jsPath',
-    '--compile-only', '--enable-type-checks', '--warnings-as-errors',
-    dartPath]);
+  onExit(int exitCode, String stdout, String stderr) {
+    if (exitCode != 0) {
+      final message = 'Non-zero exit code from $compilerPath';
+      print('$message.');
+      print(stdout);
+      print(stderr);
+      throw message;
+    }
+  }
 
-  process.stdout.pipe(stdout, close: false);
+  onError(error) {
+    final message = 'Error trying to execute $compilerPath. Error: $error';
+    print('$message.');
+    throw message;
+  }
 
-  process.onError = (error) {
-    print('Failed to compile $dartPath with $compilerPath. Error:');
-    print(error);
-  };
+  print('Compiling $dartPath to $jsPath');
+  new Process.run(compilerPath, [
+    '--libdir=$libDir', '--out=$jsPath',
+    '--compile-only', '--enable-type-checks', '--warnings-as-errors',
+    dartPath], null, onExit).onError = onError;
 }
 
 class Dartdoc {