diff -r ef76fc2ac88c -r e4420d2515f1 org.chromium.sdk/src/org/chromium/sdk/JavascriptVm.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/JavascriptVm.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,108 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.sdk;
+
+import java.util.Collection;
+
+import org.chromium.sdk.internal.tools.v8.MethodIsBlockingException;
+
+/**
+ * Abstraction of a remote Javascript virtual machine. Clients can use it to
+ * conduct debugging process. This interface does not specify attach method,
+ * because it cannot be polymorphous.
+ */
+public interface JavascriptVm {
+
+  /**
+   * A callback for breakpoint-related requests.
+   */
+  public interface BreakpointCallback {
+
+    void success(Breakpoint breakpoint);
+
+    void failure(String errorMessage);
+  }
+
+  /**
+   * A callback for retrieving scripts.
+   */
+  public interface ScriptsCallback {
+
+    void success(Collection<Script> scripts);
+
+    void failure(String errorMessage);
+  }
+
+  /**
+   * A callback for suspend request.
+   */
+  public interface SuspendCallback {
+
+    /**
+     * Signals that command successfully finished. After this DebugContext should be built
+     * and unless there are some problems,
+     * {@link DebugEventListener#suspended(DebugContext)} will be called soon.
+     */
+    void success();
+
+    void failure(Exception reason);
+  }
+
+  /**
+   * Detaches from the related tab debugger.
+   *
+   * @return whether the operation succeeded
+   */
+  boolean detach();
+
+  /**
+   * @return whether the tab is currently attached
+   */
+  boolean isAttached();
+
+  /**
+   * Retrieves user scripts loaded into the tab.
+   * Blocks until the result is ready.
+   *
+   * @param callback to invoke once the operation result is available,
+   *        may be {@code null}
+   * @throws MethodIsBlockingException if called from a callback because it
+   *         blocks until scripts are received
+   */
+  void getScripts(ScriptsCallback callback) throws MethodIsBlockingException;
+
+  /**
+   * Sets a breakpoint with the specified parameters.
+   *
+   * @param type of the breakpoint
+   * @param target of the breakpoint, depends on the {@code type} value:
+   *        <table border=1>
+   *          <tr><td>type value</td><td>target value</td></tr>
+   *          <tr><td>FUNCTION</td><td>a function expression</td></tr>
+   *          <tr><td>SCRIPT_NAME</td><td>a script name (as reported by Script#getName())</td></tr>
+   *          <tr><td>SCRIPT_ID</td><td>a stringified script ID (as reported by Script#getId())</td></tr>
+   *        </table>
+   * @param line in the script or function. If none, use
+   *        {@link Breakpoint#EMPTY_VALUE}
+   * @param position of the target start within the line. If none, use
+   *        {@link Breakpoint#EMPTY_VALUE}
+   * @param enabled whether the breakpoint is enabled initially
+   * @param condition nullable string with breakpoint condition
+   * @param ignoreCount number specifying the amount of breakpoint hits to
+   *        ignore. If none, use {@link Breakpoint#EMPTY_VALUE}
+   * @param callback to invoke when the evaluation result is ready,
+   *        may be {@code null}
+   */
+  void setBreakpoint(Breakpoint.Type type, String target, int line, int position, boolean enabled,
+      String condition, int ignoreCount, BreakpointCallback callback);
+
+  /**
+   * Tries to suspend VM. If successful, {@link DebugEventListener#suspended(DebugContext)}
+   * will be called.
+   * @param callback to invoke once the operation result is available,
+   *        may be {@code null}
+   */
+  void suspend(SuspendCallback callback);
+}