Perform a full GC by default when requesting a heap snapshot.

runtime/observatory/lib/src/app/location_manager.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of app;
 
 class LocationManager extends Observable {
   final _defaultPath = '/vm';
 
   final ObservatoryApplication _app;
@@ skipping 16 matching lines @@
       // use the default.
       applicationPath = makeLink(_defaultPath);
     }
     // Update current application path.
     window.history.replaceState(applicationPath,
                                 document.title,
                                 applicationPath);
     _updateApplicationLocation(applicationPath);
   }
 
+  bool getBoolParameter(String name, bool defaultValue) {
+    var value = uri.queryParameters[name];
+    if ("true" == value) return true;
+    if ("false" == value) return false;
+    return defaultValue;
+  }
+
   /// Called whenever the browser changes the location bar (e.g. forward or
   /// back button press).
   void _onBrowserNavigation(PopStateEvent event) {
     _updateApplicationLocation(window.location.hash);
     _visit();
   }
 
   /// Given an application url, generate an href link.
   String makeLink(String url) => '#$url';
 
@@ skipping 113 matching lines @@
       // let browser handle.
       return;
     }
     event.preventDefault();
     // 'currentTarget' is the dom element that would process the event.
     // If we use 'target' we might get an <em> element or somesuch.
     var target = event.currentTarget;
     go(target.attributes['href']);
   }
 }