Roll Observatory deps (charted -> ^0.3.0)

packages/dart_style/test/regression/0300/0370.stmt

 >>>
 return environment.barback.getAssetById(id).then((result) {
   return result;
 }).then((asset) => _serveAsset(request, asset)).catchError(
     (error,
         trace) {
   if (error is! AssetNotFoundException) throw error;
   return environment.barback
       .getAssetById(id.addExtension("/index.html"))
       .then((asset) {
@@ skipping 18 matching lines @@
 
     addError(error, trace);
     close();
     return new shelf.Response.internalServerError();
   }
 
   addResult(new BarbackServerResult._failure(request.url, id, error));
   return notFound(request, asset: id);
 });
 <<<
-return environment.barback.getAssetById(id).then((result) {
-  return result;
-}).then((asset) => _serveAsset(request, asset)).catchError((error, trace) {
-  if (error is! AssetNotFoundException) throw error;
-  return environment.barback
-      .getAssetById(id.addExtension("/index.html"))
-      .then((asset) {
-    if (request.url.path.endsWith('/')) return _serveAsset(request, asset);
+return environment.barback
+    .getAssetById(id)
+    .then((result) {
+      return result;
+    })
+    .then((asset) => _serveAsset(request, asset))
+    .catchError((error, trace) {
+      if (error is! AssetNotFoundException) throw error;
+      return environment.barback
+          .getAssetById(id.addExtension("/index.html"))
+          .then((asset) {
+        if (request.url.path.endsWith('/')) return _serveAsset(request, asset);
 
-    // We only want to serve index.html if the URL explicitly ends in a
-    // slash. For other URLs, we redirect to one with the slash added to
-    // implicitly support that too. This follows Apache's behavior.
-    logRequest(request, "302 Redirect to ${request.url}/");
-    return new shelf.Response.found('${request.url}/');
-  }).catchError((newError, newTrace) {
-    // If we find neither the original file or the index, we should report
-    // the error about the original to the user.
-    throw newError is AssetNotFoundException ? error : newError;
-  });
-}).catchError((error, trace) {
-  if (error is! AssetNotFoundException) {
-    trace = new Chain.forTrace(trace);
-    logRequest(request, "$error\n$trace");
+        // We only want to serve index.html if the URL explicitly ends in a
+        // slash. For other URLs, we redirect to one with the slash added to
+        // implicitly support that too. This follows Apache's behavior.
+        logRequest(request, "302 Redirect to ${request.url}/");
+        return new shelf.Response.found('${request.url}/');
+      }).catchError((newError, newTrace) {
+        // If we find neither the original file or the index, we should report
+        // the error about the original to the user.
+        throw newError is AssetNotFoundException ? error : newError;
+      });
+    })
+    .catchError((error, trace) {
+      if (error is! AssetNotFoundException) {
+        trace = new Chain.forTrace(trace);
+        logRequest(request, "$error\n$trace");
 
-    addError(error, trace);
-    close();
-    return new shelf.Response.internalServerError();
-  }
+        addError(error, trace);
+        close();
+        return new shelf.Response.internalServerError();
+      }
 
-  addResult(new BarbackServerResult._failure(request.url, id, error));
-  return notFound(request, asset: id);
-});
+      addResult(new BarbackServerResult._failure(request.url, id, error));
+      return notFound(request, asset: id);
+    });