Update third_party/document_image_extractor

third_party/document_image_extractor/third_party/closure-library/closure/goog/promise/promise.js

Index: third_party/document_image_extractor/third_party/closure-library/closure/goog/promise/promise.js
diff --git a/third_party/document_image_extractor/third_party/closure-library/closure/goog/promise/promise.js b/third_party/document_image_extractor/third_party/closure-library/closure/goog/promise/promise.js
deleted file mode 100644
index fb88e46208236ed9c862eeb0268f3a0659ba4201..0000000000000000000000000000000000000000
--- a/third_party/document_image_extractor/third_party/closure-library/closure/goog/promise/promise.js
+++ /dev/null
@@ -1,1241 +0,0 @@
-// Copyright 2013 The Closure Library Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS-IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-goog.provide('goog.Promise');
-
-goog.require('goog.Thenable');
-goog.require('goog.asserts');
-goog.require('goog.async.FreeList');
-goog.require('goog.async.run');
-goog.require('goog.async.throwException');
-goog.require('goog.debug.Error');
-goog.require('goog.promise.Resolver');
-
-
-
-/**
- * Promises provide a result that may be resolved asynchronously. A Promise may
- * be resolved by being fulfilled or rejected with a value, which will be known
- * as the fulfillment value or the rejection reason. Whether fulfilled or
- * rejected, the Promise result is immutable once it is set.
- *
- * Promises may represent results of any type, including undefined. Rejection
- * reasons are typically Errors, but may also be of any type. Closure Promises
- * allow for optional type annotations that enforce that fulfillment values are
- * of the appropriate types at compile time.
- *
- * The result of a Promise is accessible by calling {@code then} and registering
- * {@code onFulfilled} and {@code onRejected} callbacks. Once the Promise
- * resolves, the relevant callbacks are invoked with the fulfillment value or
- * rejection reason as argument. Callbacks are always invoked in the order they
- * were registered, even when additional {@code then} calls are made from inside
- * another callback. A callback is always run asynchronously sometime after the
- * scope containing the registering {@code then} invocation has returned.
- *
- * If a Promise is resolved with another Promise, the first Promise will block
- * until the second is resolved, and then assumes the same result as the second
- * Promise. This allows Promises to depend on the results of other Promises,
- * linking together multiple asynchronous operations.
- *
- * This implementation is compatible with the Promises/A+ specification and
- * passes that specification's conformance test suite. A Closure Promise may be
- * resolved with a Promise instance (or sufficiently compatible Promise-like
- * object) created by other Promise implementations. From the specification,
- * Promise-like objects are known as "Thenables".
- *
- * @see http://promisesaplus.com/
- *
- * @param {function(
- *             this:RESOLVER_CONTEXT,
- *             function((TYPE|IThenable<TYPE>|Thenable)=),
- *             function(*)): void} resolver
- *     Initialization function that is invoked immediately with {@code resolve}
- *     and {@code reject} functions as arguments. The Promise is resolved or
- *     rejected with the first argument passed to either function.
- * @param {RESOLVER_CONTEXT=} opt_context An optional context for executing the
- *     resolver function. If unspecified, the resolver function will be executed
- *     in the default scope.
- * @constructor
- * @struct
- * @final
- * @implements {goog.Thenable<TYPE>}
- * @template TYPE,RESOLVER_CONTEXT
- */
-goog.Promise = function(resolver, opt_context) {
-  /**
-   * The internal state of this Promise. Either PENDING, FULFILLED, REJECTED, or
-   * BLOCKED.
-   * @private {goog.Promise.State_}
-   */
-  this.state_ = goog.Promise.State_.PENDING;
-
-  /**
-   * The resolved result of the Promise. Immutable once set with either a
-   * fulfillment value or rejection reason.
-   * @private {*}
-   */
-  this.result_ = undefined;
-
-  /**
-   * For Promises created by calling {@code then()}, the originating parent.
-   * @private {goog.Promise}
-   */
-  this.parent_ = null;
-
-  /**
-   * The linked list of {@code onFulfilled} and {@code onRejected} callbacks
-   * added to this Promise by calls to {@code then()}.
-   * @private {?goog.Promise.CallbackEntry_}
-   */
-  this.callbackEntries_ = null;
-
-  /**
-   * The tail of the linked list of {@code onFulfilled} and {@code onRejected}
-   * callbacks added to this Promise by calls to {@code then()}.
-   * @private {?goog.Promise.CallbackEntry_}
-   */
-  this.callbackEntriesTail_ = null;
-
-  /**
-   * Whether the Promise is in the queue of Promises to execute.
-   * @private {boolean}
-   */
-  this.executing_ = false;
-
-  if (goog.Promise.UNHANDLED_REJECTION_DELAY > 0) {
-    /**
-     * A timeout ID used when the {@code UNHANDLED_REJECTION_DELAY} is greater
-     * than 0 milliseconds. The ID is set when the Promise is rejected, and
-     * cleared only if an {@code onRejected} callback is invoked for the
-     * Promise (or one of its descendants) before the delay is exceeded.
-     *
-     * If the rejection is not handled before the timeout completes, the
-     * rejection reason is passed to the unhandled rejection handler.
-     * @private {number}
-     */
-    this.unhandledRejectionId_ = 0;
-  } else if (goog.Promise.UNHANDLED_REJECTION_DELAY == 0) {
-    /**
-     * When the {@code UNHANDLED_REJECTION_DELAY} is set to 0 milliseconds, a
-     * boolean that is set if the Promise is rejected, and reset to false if an
-     * {@code onRejected} callback is invoked for the Promise (or one of its
-     * descendants). If the rejection is not handled before the next timestep,
-     * the rejection reason is passed to the unhandled rejection handler.
-     * @private {boolean}
-     */
-    this.hadUnhandledRejection_ = false;
-  }
-
-  if (goog.Promise.LONG_STACK_TRACES) {
-    /**
-     * A list of stack trace frames pointing to the locations where this Promise
-     * was created or had callbacks added to it. Saved to add additional context
-     * to stack traces when an exception is thrown.
-     * @private {!Array<string>}
-     */
-    this.stack_ = [];
-    this.addStackTrace_(new Error('created'));
-
-    /**
-     * Index of the most recently executed stack frame entry.
-     * @private {number}
-     */
-    this.currentStep_ = 0;
-  }
-
-  if (resolver == goog.Promise.RESOLVE_FAST_PATH_) {
-    // If the special sentinel resolver value is passed (from
-    // goog.Promise.resolve) we short cut to immediately resolve the promise
-    // using the value passed as opt_context. Don't try this at home.
-    this.resolve_(goog.Promise.State_.FULFILLED, opt_context);
-  } else {
-    try {
-      var self = this;
-      resolver.call(
-          opt_context,
-          function(value) {
-            self.resolve_(goog.Promise.State_.FULFILLED, value);
-          },
-          function(reason) {
-            if (goog.DEBUG &&
-                !(reason instanceof goog.Promise.CancellationError)) {
-              try {
-                // Promise was rejected. Step up one call frame to see why.
-                if (reason instanceof Error) {
-                  throw reason;
-                } else {
-                  throw new Error('Promise rejected.');
-                }
-              } catch (e) {
-                // Only thrown so browser dev tools can catch rejections of
-                // promises when the option to break on caught exceptions is
-                // activated.
-              }
-            }
-            self.resolve_(goog.Promise.State_.REJECTED, reason);
-          });
-    } catch (e) {
-      this.resolve_(goog.Promise.State_.REJECTED, e);
-    }
-  }
-};
-
-
-/**
- * @define {boolean} Whether traces of {@code then} calls should be included in
- * exceptions thrown
- */
-goog.define('goog.Promise.LONG_STACK_TRACES', false);
-
-
-/**
- * @define {number} The delay in milliseconds before a rejected Promise's reason
- * is passed to the rejection handler. By default, the rejection handler
- * rethrows the rejection reason so that it appears in the developer console or
- * {@code window.onerror} handler.
- *
- * Rejections are rethrown as quickly as possible by default. A negative value
- * disables rejection handling entirely.
- */
-goog.define('goog.Promise.UNHANDLED_REJECTION_DELAY', 0);
-
-
-/**
- * The possible internal states for a Promise. These states are not directly
- * observable to external callers.
- * @enum {number}
- * @private
- */
-goog.Promise.State_ = {
-  /** The Promise is waiting for resolution. */
-  PENDING: 0,
-
-  /** The Promise is blocked waiting for the result of another Thenable. */
-  BLOCKED: 1,
-
-  /** The Promise has been resolved with a fulfillment value. */
-  FULFILLED: 2,
-
-  /** The Promise has been resolved with a rejection reason. */
-  REJECTED: 3
-};
-
-
-
-/**
- * Entries in the callback chain. Each call to {@code then},
- * {@code thenCatch}, or {@code thenAlways} creates an entry containing the
- * functions that may be invoked once the Promise is resolved.
- *
- * @private @final @struct @constructor
- */
-goog.Promise.CallbackEntry_ = function() {
-  /** @type {?goog.Promise} */
-  this.child = null;
-  /** @type {Function} */
-  this.onFulfilled = null;
-  /** @type {Function} */
-  this.onRejected = null;
-  /** @type {?} */
-  this.context = null;
-  /** @type {?goog.Promise.CallbackEntry_} */
-  this.next = null;
-
-  /**
-   * A boolean value to indicate this is a "thenAlways" callback entry.
-   * Unlike a normal "then/thenVoid" a "thenAlways doesn't particapate
-   * in "cancel" considerations but is simply an observer and requires
-   * special handling.
-   * @type {boolean}
-   */
-  this.always = false;
-};
-
-
-/** clear the object prior to reuse */
-goog.Promise.CallbackEntry_.prototype.reset = function() {
-  this.child = null;
-  this.onFulfilled = null;
-  this.onRejected = null;
-  this.context = null;
-  this.always = false;
-};
-
-
-/**
- * @define {number} The number of currently unused objects to keep around for
- *    reuse.
- */
-goog.define('goog.Promise.DEFAULT_MAX_UNUSED', 100);
-
-
-/** @const @private {goog.async.FreeList<!goog.Promise.CallbackEntry_>} */
-goog.Promise.freelist_ = new goog.async.FreeList(
-    function() {
-      return new goog.Promise.CallbackEntry_();
-    },
-    function(item) {
-      item.reset();
-    },
-    goog.Promise.DEFAULT_MAX_UNUSED);
-
-
-/**
- * @param {Function} onFulfilled
- * @param {Function} onRejected
- * @param {?} context
- * @return {!goog.Promise.CallbackEntry_}
- * @private
- */
-goog.Promise.getCallbackEntry_ = function(onFulfilled, onRejected, context) {
-  var entry = goog.Promise.freelist_.get();
-  entry.onFulfilled = onFulfilled;
-  entry.onRejected = onRejected;
-  entry.context = context;
-  return entry;
-};
-
-
-/**
- * @param {!goog.Promise.CallbackEntry_} entry
- * @private
- */
-goog.Promise.returnEntry_ = function(entry) {
-  goog.Promise.freelist_.put(entry);
-};
-
-
-/**
- * If this passed as the first argument to the {@link goog.Promise} constructor
- * the the opt_context is (against its primary use) used to immediately resolve
- * the promise. This is used from  {@link goog.Promise.resolve} as an
- * optimization to avoid allocating 3 closures that are never really needed.
- * @private @const {!Function}
- */
-goog.Promise.RESOLVE_FAST_PATH_ = function() {};
-
-
-/**
- * @param {(TYPE|goog.Thenable<TYPE>|Thenable)=} opt_value
- * @return {!goog.Promise<TYPE>} A new Promise that is immediately resolved
- *     with the given value.
- * @template TYPE
- */
-goog.Promise.resolve = function(opt_value) {
-  // Passes the value as the context, which is a special fast pass when
-  // goog.Promise.RESOLVE_FAST_PATH_ is passed as the first argument.
-  return new goog.Promise(goog.Promise.RESOLVE_FAST_PATH_, opt_value);
-};
-
-
-/**
- * @param {*=} opt_reason
- * @return {!goog.Promise} A new Promise that is immediately rejected with the
- *     given reason.
- */
-goog.Promise.reject = function(opt_reason) {
-  return new goog.Promise(function(resolve, reject) {
-    reject(opt_reason);
-  });
-};
-
-
-/**
- * @param {!Array<!(goog.Thenable<TYPE>|Thenable)>} promises
- * @return {!goog.Promise<TYPE>} A Promise that receives the result of the
- *     first Promise (or Promise-like) input to complete.
- * @template TYPE
- */
-goog.Promise.race = function(promises) {
-  return new goog.Promise(function(resolve, reject) {
-    if (!promises.length) {
-      resolve(undefined);
-    }
-    for (var i = 0, promise; promise = promises[i]; i++) {
-      goog.Promise.maybeThenVoid_(promise, resolve, reject);
-    }
-  });
-};
-
-
-/**
- * @param {!Array<!(goog.Thenable<TYPE>|Thenable)>} promises
- * @return {!goog.Promise<!Array<TYPE>>} A Promise that receives a list of
- *     every fulfilled value once every input Promise (or Promise-like) is
- *     successfully fulfilled, or is rejected by the first rejection result.
- * @template TYPE
- */
-goog.Promise.all = function(promises) {
-  return new goog.Promise(function(resolve, reject) {
-    var toFulfill = promises.length;
-    var values = [];
-
-    if (!toFulfill) {
-      resolve(values);
-      return;
-    }
-
-    var onFulfill = function(index, value) {
-      toFulfill--;
-      values[index] = value;
-      if (toFulfill == 0) {
-        resolve(values);
-      }
-    };
-
-    var onReject = function(reason) {
-      reject(reason);
-    };
-
-    for (var i = 0, promise; promise = promises[i]; i++) {
-      goog.Promise.maybeThenVoid_(
-          promise, goog.partial(onFulfill, i), onReject);
-    }
-  });
-};
-
-
-/**
- * @param {!Array<!(goog.Thenable<TYPE>|Thenable)>} promises
- * @return {!goog.Promise<TYPE>} A Promise that receives the value of the first
- *     input to be fulfilled, or is rejected with a list of every rejection
- *     reason if all inputs are rejected.
- * @template TYPE
- */
-goog.Promise.firstFulfilled = function(promises) {
-  return new goog.Promise(function(resolve, reject) {
-    var toReject = promises.length;
-    var reasons = [];
-
-    if (!toReject) {
-      resolve(undefined);
-      return;
-    }
-
-    var onFulfill = function(value) {
-      resolve(value);
-    };
-
-    var onReject = function(index, reason) {
-      toReject--;
-      reasons[index] = reason;
-      if (toReject == 0) {
-        reject(reasons);
-      }
-    };
-
-    for (var i = 0, promise; promise = promises[i]; i++) {
-      goog.Promise.maybeThenVoid_(
-          promise, onFulfill, goog.partial(onReject, i));
-    }
-  });
-};
-
-
-/**
- * @return {!goog.promise.Resolver<TYPE>} Resolver wrapping the promise and its
- *     resolve / reject functions. Resolving or rejecting the resolver
- *     resolves or rejects the promise.
- * @template TYPE
- */
-goog.Promise.withResolver = function() {
-  var resolve, reject;
-  var promise = new goog.Promise(function(rs, rj) {
-    resolve = rs;
-    reject = rj;
-  });
-  return new goog.Promise.Resolver_(promise, resolve, reject);
-};
-
-
-/**
- * Adds callbacks that will operate on the result of the Promise, returning a
- * new child Promise.
- *
- * If the Promise is fulfilled, the {@code onFulfilled} callback will be invoked
- * with the fulfillment value as argument, and the child Promise will be
- * fulfilled with the return value of the callback. If the callback throws an
- * exception, the child Promise will be rejected with the thrown value instead.
- *
- * If the Promise is rejected, the {@code onRejected} callback will be invoked
- * with the rejection reason as argument, and the child Promise will be resolved
- * with the return value or rejected with the thrown value of the callback.
- *
- * @override
- */
-goog.Promise.prototype.then = function(
-    opt_onFulfilled, opt_onRejected, opt_context) {
-
-  if (opt_onFulfilled != null) {
-    goog.asserts.assertFunction(opt_onFulfilled,
-        'opt_onFulfilled should be a function.');
-  }
-  if (opt_onRejected != null) {
-    goog.asserts.assertFunction(opt_onRejected,
-        'opt_onRejected should be a function. Did you pass opt_context ' +
-        'as the second argument instead of the third?');
-  }
-
-  if (goog.Promise.LONG_STACK_TRACES) {
-    this.addStackTrace_(new Error('then'));
-  }
-
-  return this.addChildPromise_(
-      goog.isFunction(opt_onFulfilled) ? opt_onFulfilled : null,
-      goog.isFunction(opt_onRejected) ? opt_onRejected : null,
-      opt_context);
-};
-goog.Thenable.addImplementation(goog.Promise);
-
-
-/**
- * Adds callbacks that will operate on the result of the Promise without
- * returning a child Promise (unlike "then").
- *
- * If the Promise is fulfilled, the {@code onFulfilled} callback will be invoked
- * with the fulfillment value as argument.
- *
- * If the Promise is rejected, the {@code onRejected} callback will be invoked
- * with the rejection reason as argument.
- *
- * @param {?(function(this:THIS, TYPE):
- *             (RESULT|IThenable<RESULT>|Thenable))=} opt_onFulfilled A
- *     function that will be invoked with the fulfillment value if the Promise
- *     is fullfilled.
- * @param {?(function(this:THIS, *): *)=} opt_onRejected A function that will
- *     be invoked with the rejection reason if the Promise is rejected.
- * @param {THIS=} opt_context An optional context object that will be the
- *     execution context for the callbacks. By default, functions are executed
- *     with the default this.
- * @package
- * @template RESULT,THIS
- */
-goog.Promise.prototype.thenVoid = function(
-    opt_onFulfilled, opt_onRejected, opt_context) {
-
-  if (opt_onFulfilled != null) {
-    goog.asserts.assertFunction(opt_onFulfilled,
-        'opt_onFulfilled should be a function.');
-  }
-  if (opt_onRejected != null) {
-    goog.asserts.assertFunction(opt_onRejected,
-        'opt_onRejected should be a function. Did you pass opt_context ' +
-        'as the second argument instead of the third?');
-  }
-
-  if (goog.Promise.LONG_STACK_TRACES) {
-    this.addStackTrace_(new Error('then'));
-  }
-
-  // Note: no default rejection handler is provided here as we need to
-  // distinguish unhandled rejections.
-  this.addCallbackEntry_(goog.Promise.getCallbackEntry_(
-      opt_onFulfilled || goog.nullFunction,
-      opt_onRejected || null,
-      opt_context));
-};
-
-
-/**
- * Calls "thenVoid" if possible to avoid allocating memory. Otherwise calls
- * "then".
- * @param {(goog.Thenable<TYPE>|Thenable)} promise
- * @param {function(this:THIS, TYPE): ?} onFulfilled
- * @param {function(this:THIS, *): *} onRejected
- * @param {THIS=} opt_context
- * @template THIS,TYPE
- * @private
- */
-goog.Promise.maybeThenVoid_ = function(
-    promise, onFulfilled, onRejected, opt_context) {
-  if (promise instanceof goog.Promise) {
-    promise.thenVoid(onFulfilled, onRejected, opt_context);
-  } else {
-    promise.then(onFulfilled, onRejected, opt_context);
-  }
-};
-
-
-/**
- * Adds a callback that will be invoked whether the Promise is fulfilled or
- * rejected. The callback receives no argument, and no new child Promise is
- * created. This is useful for ensuring that cleanup takes place after certain
- * asynchronous operations. Callbacks added with {@code thenAlways} will be
- * executed in the same order with other calls to {@code then},
- * {@code thenAlways}, or {@code thenCatch}.
- *
- * Since it does not produce a new child Promise, cancellation propagation is
- * not prevented by adding callbacks with {@code thenAlways}. A Promise that has
- * a cleanup handler added with {@code thenAlways} will be canceled if all of
- * its children created by {@code then} (or {@code thenCatch}) are canceled.
- * Additionally, since any rejections are not passed to the callback, it does
- * not stop the unhandled rejection handler from running.
- *
- * @param {function(this:THIS): void} onResolved A function that will be invoked
- *     when the Promise is resolved.
- * @param {THIS=} opt_context An optional context object that will be the
- *     execution context for the callbacks. By default, functions are executed
- *     in the global scope.
- * @return {!goog.Promise<TYPE>} This Promise, for chaining additional calls.
- * @template THIS
- */
-goog.Promise.prototype.thenAlways = function(onResolved, opt_context) {
-  if (goog.Promise.LONG_STACK_TRACES) {
-    this.addStackTrace_(new Error('thenAlways'));
-  }
-
-  var callback = function() {
-    try {
-      // Ensure that no arguments are passed to onResolved.
-      onResolved.call(opt_context);
-    } catch (err) {
-      goog.Promise.handleRejection_.call(null, err);
-    }
-  };
-
-  var entry = goog.Promise.getCallbackEntry_(callback, callback, null);
-  entry.always = true;
-  this.addCallbackEntry_(entry);
-  return this;
-};
-
-
-/**
- * Adds a callback that will be invoked only if the Promise is rejected. This
- * is equivalent to {@code then(null, onRejected)}.
- *
- * @param {!function(this:THIS, *): *} onRejected A function that will be
- *     invoked with the rejection reason if the Promise is rejected.
- * @param {THIS=} opt_context An optional context object that will be the
- *     execution context for the callbacks. By default, functions are executed
- *     in the global scope.
- * @return {!goog.Promise} A new Promise that will receive the result of the
- *     callback.
- * @template THIS
- */
-goog.Promise.prototype.thenCatch = function(onRejected, opt_context) {
-  if (goog.Promise.LONG_STACK_TRACES) {
-    this.addStackTrace_(new Error('thenCatch'));
-  }
-  return this.addChildPromise_(null, onRejected, opt_context);
-};
-
-
-/**
- * Cancels the Promise if it is still pending by rejecting it with a cancel
- * Error. No action is performed if the Promise is already resolved.
- *
- * All child Promises of the canceled Promise will be rejected with the same
- * cancel error, as with normal Promise rejection. If the Promise to be canceled
- * is the only child of a pending Promise, the parent Promise will also be
- * canceled. Cancellation may propagate upward through multiple generations.
- *
- * @param {string=} opt_message An optional debugging message for describing the
- *     cancellation reason.
- */
-goog.Promise.prototype.cancel = function(opt_message) {
-  if (this.state_ == goog.Promise.State_.PENDING) {
-    goog.async.run(function() {
-      var err = new goog.Promise.CancellationError(opt_message);
-      this.cancelInternal_(err);
-    }, this);
-  }
-};
-
-
-/**
- * Cancels this Promise with the given error.
- *
- * @param {!Error} err The cancellation error.
- * @private
- */
-goog.Promise.prototype.cancelInternal_ = function(err) {
-  if (this.state_ == goog.Promise.State_.PENDING) {
-    if (this.parent_) {
-      // Cancel the Promise and remove it from the parent's child list.
-      this.parent_.cancelChild_(this, err);
-      this.parent_ = null;
-    } else {
-      this.resolve_(goog.Promise.State_.REJECTED, err);
-    }
-  }
-};
-
-
-/**
- * Cancels a child Promise from the list of callback entries. If the Promise has
- * not already been resolved, reject it with a cancel error. If there are no
- * other children in the list of callback entries, propagate the cancellation
- * by canceling this Promise as well.
- *
- * @param {!goog.Promise} childPromise The Promise to cancel.
- * @param {!Error} err The cancel error to use for rejecting the Promise.
- * @private
- */
-goog.Promise.prototype.cancelChild_ = function(childPromise, err) {
-  if (!this.callbackEntries_) {
-    return;
-  }
-  var childCount = 0;
-  var childEntry = null;
-  var beforeChildEntry = null;
-
-  // Find the callback entry for the childPromise, and count whether there are
-  // additional child Promises.
-  for (var entry = this.callbackEntries_; entry; entry = entry.next) {
-    if (!entry.always) {
-      childCount++;
-      if (entry.child == childPromise) {
-        childEntry = entry;
-      }
-      if (childEntry && childCount > 1) {
-        break;
-      }
-    }
-    if (!childEntry) {
-      beforeChildEntry = entry;
-    }
-  }
-
-  // Can a child entry be missing?
-
-  // If the child Promise was the only child, cancel this Promise as well.
-  // Otherwise, reject only the child Promise with the cancel error.
-  if (childEntry) {
-    if (this.state_ == goog.Promise.State_.PENDING && childCount == 1) {
-      this.cancelInternal_(err);
-    } else {
-      if (beforeChildEntry) {
-        this.removeEntryAfter_(beforeChildEntry);
-      } else {
-        this.popEntry_();
-      }
-
-      this.executeCallback_(
-          childEntry, goog.Promise.State_.REJECTED, err);
-    }
-  }
-};
-
-
-/**
- * Adds a callback entry to the current Promise, and schedules callback
- * execution if the Promise has already been resolved.
- *
- * @param {goog.Promise.CallbackEntry_} callbackEntry Record containing
- *     {@code onFulfilled} and {@code onRejected} callbacks to execute after
- *     the Promise is resolved.
- * @private
- */
-goog.Promise.prototype.addCallbackEntry_ = function(callbackEntry) {
-  if (!this.hasEntry_() &&
-      (this.state_ == goog.Promise.State_.FULFILLED ||
-       this.state_ == goog.Promise.State_.REJECTED)) {
-    this.scheduleCallbacks_();
-  }
-  this.queueEntry_(callbackEntry);
-};
-
-
-/**
- * Creates a child Promise and adds it to the callback entry list. The result of
- * the child Promise is determined by the state of the parent Promise and the
- * result of the {@code onFulfilled} or {@code onRejected} callbacks as
- * specified in the Promise resolution procedure.
- *
- * @see http://promisesaplus.com/#the__method
- *
- * @param {?function(this:THIS, TYPE):
- *          (RESULT|goog.Promise<RESULT>|Thenable)} onFulfilled A callback that
- *     will be invoked if the Promise is fullfilled, or null.
- * @param {?function(this:THIS, *): *} onRejected A callback that will be
- *     invoked if the Promise is rejected, or null.
- * @param {THIS=} opt_context An optional execution context for the callbacks.
- *     in the default calling context.
- * @return {!goog.Promise} The child Promise.
- * @template RESULT,THIS
- * @private
- */
-goog.Promise.prototype.addChildPromise_ = function(
-    onFulfilled, onRejected, opt_context) {
-
-  /** @type {goog.Promise.CallbackEntry_} */
-  var callbackEntry = goog.Promise.getCallbackEntry_(null, null, null);
-
-  callbackEntry.child = new goog.Promise(function(resolve, reject) {
-    // Invoke onFulfilled, or resolve with the parent's value if absent.
-    callbackEntry.onFulfilled = onFulfilled ? function(value) {
-      try {
-        var result = onFulfilled.call(opt_context, value);
-        resolve(result);
-      } catch (err) {
-        reject(err);
-      }
-    } : resolve;
-
-    // Invoke onRejected, or reject with the parent's reason if absent.
-    callbackEntry.onRejected = onRejected ? function(reason) {
-      try {
-        var result = onRejected.call(opt_context, reason);
-        if (!goog.isDef(result) &&
-            reason instanceof goog.Promise.CancellationError) {
-          // Propagate cancellation to children if no other result is returned.
-          reject(reason);
-        } else {
-          resolve(result);
-        }
-      } catch (err) {
-        reject(err);
-      }
-    } : reject;
-  });
-
-  callbackEntry.child.parent_ = this;
-  this.addCallbackEntry_(callbackEntry);
-  return callbackEntry.child;
-};
-
-
-/**
- * Unblocks the Promise and fulfills it with the given value.
- *
- * @param {TYPE} value
- * @private
- */
-goog.Promise.prototype.unblockAndFulfill_ = function(value) {
-  goog.asserts.assert(this.state_ == goog.Promise.State_.BLOCKED);
-  this.state_ = goog.Promise.State_.PENDING;
-  this.resolve_(goog.Promise.State_.FULFILLED, value);
-};
-
-
-/**
- * Unblocks the Promise and rejects it with the given rejection reason.
- *
- * @param {*} reason
- * @private
- */
-goog.Promise.prototype.unblockAndReject_ = function(reason) {
-  goog.asserts.assert(this.state_ == goog.Promise.State_.BLOCKED);
-  this.state_ = goog.Promise.State_.PENDING;
-  this.resolve_(goog.Promise.State_.REJECTED, reason);
-};
-
-
-/**
- * Attempts to resolve a Promise with a given resolution state and value. This
- * is a no-op if the given Promise has already been resolved.
- *
- * If the given result is a Thenable (such as another Promise), the Promise will
- * be resolved with the same state and result as the Thenable once it is itself
- * resolved.
- *
- * If the given result is not a Thenable, the Promise will be fulfilled or
- * rejected with that result based on the given state.
- *
- * @see http://promisesaplus.com/#the_promise_resolution_procedure
- *
- * @param {goog.Promise.State_} state
- * @param {*} x The result to apply to the Promise.
- * @private
- */
-goog.Promise.prototype.resolve_ = function(state, x) {
-  if (this.state_ != goog.Promise.State_.PENDING) {
-    return;
-  }
-
-  if (this == x) {
-    state = goog.Promise.State_.REJECTED;
-    x = new TypeError('Promise cannot resolve to itself');
-
-  } else if (goog.Thenable.isImplementedBy(x)) {
-    x = /** @type {!goog.Thenable} */ (x);
-    this.state_ = goog.Promise.State_.BLOCKED;
-    goog.Promise.maybeThenVoid_(
-        x, this.unblockAndFulfill_, this.unblockAndReject_, this);
-    return;
-  } else if (goog.isObject(x)) {
-    try {
-      var then = x['then'];
-      if (goog.isFunction(then)) {
-        this.tryThen_(x, then);
-        return;
-      }
-    } catch (e) {
-      state = goog.Promise.State_.REJECTED;
-      x = e;
-    }
-  }
-
-  this.result_ = x;
-  this.state_ = state;
-  // Since we can no longer be cancelled, remove link to parent, so that the
-  // child promise does not keep the parent promise alive.
-  this.parent_ = null;
-  this.scheduleCallbacks_();
-
-  if (state == goog.Promise.State_.REJECTED &&
-      !(x instanceof goog.Promise.CancellationError)) {
-    goog.Promise.addUnhandledRejection_(this, x);
-  }
-};
-
-
-/**
- * Attempts to call the {@code then} method on an object in the hopes that it is
- * a Promise-compatible instance. This allows interoperation between different
- * Promise implementations, however a non-compliant object may cause a Promise
- * to hang indefinitely. If the {@code then} method throws an exception, the
- * dependent Promise will be rejected with the thrown value.
- *
- * @see http://promisesaplus.com/#point-70
- *
- * @param {Thenable} thenable An object with a {@code then} method that may be
- *     compatible with the Promise/A+ specification.
- * @param {!Function} then The {@code then} method of the Thenable object.
- * @private
- */
-goog.Promise.prototype.tryThen_ = function(thenable, then) {
-  this.state_ = goog.Promise.State_.BLOCKED;
-  var promise = this;
-  var called = false;
-
-  var resolve = function(value) {
-    if (!called) {
-      called = true;
-      promise.unblockAndFulfill_(value);
-    }
-  };
-
-  var reject = function(reason) {
-    if (!called) {
-      called = true;
-      promise.unblockAndReject_(reason);
-    }
-  };
-
-  try {
-    then.call(thenable, resolve, reject);
-  } catch (e) {
-    reject(e);
-  }
-};
-
-
-/**
- * Executes the pending callbacks of a resolved Promise after a timeout.
- *
- * Section 2.2.4 of the Promises/A+ specification requires that Promise
- * callbacks must only be invoked from a call stack that only contains Promise
- * implementation code, which we accomplish by invoking callback execution after
- * a timeout. If {@code startExecution_} is called multiple times for the same
- * Promise, the callback chain will be evaluated only once. Additional callbacks
- * may be added during the evaluation phase, and will be executed in the same
- * event loop.
- *
- * All Promises added to the waiting list during the same browser event loop
- * will be executed in one batch to avoid using a separate timeout per Promise.
- *
- * @private
- */
-goog.Promise.prototype.scheduleCallbacks_ = function() {
-  if (!this.executing_) {
-    this.executing_ = true;
-    goog.async.run(this.executeCallbacks_, this);
-  }
-};
-
-
-/**
- * @return {boolean} Whether there are any pending callbacks queued.
- * @private
- */
-goog.Promise.prototype.hasEntry_ = function() {
-  return !!this.callbackEntries_;
-};
-
-
-/**
- * @param {goog.Promise.CallbackEntry_} entry
- * @private
- */
-goog.Promise.prototype.queueEntry_ = function(entry) {
-  goog.asserts.assert(entry.onFulfilled != null);
-
-  if (this.callbackEntriesTail_) {
-    this.callbackEntriesTail_.next = entry;
-    this.callbackEntriesTail_ = entry;
-  } else {
-    // It the work queue was empty set the head too.
-    this.callbackEntries_ = entry;
-    this.callbackEntriesTail_ = entry;
-  }
-};
-
-
-/**
- * @return {goog.Promise.CallbackEntry_} entry
- * @private
- */
-goog.Promise.prototype.popEntry_ = function() {
-  var entry = null;
-  if (this.callbackEntries_) {
-    entry = this.callbackEntries_;
-    this.callbackEntries_ = entry.next;
-    entry.next = null;
-  }
-  // It the work queue is empty clear the tail too.
-  if (!this.callbackEntries_) {
-    this.callbackEntriesTail_ = null;
-  }
-
-  if (entry != null) {
-    goog.asserts.assert(entry.onFulfilled != null);
-  }
-  return entry;
-};
-
-
-/**
- * @param {goog.Promise.CallbackEntry_} previous
- * @private
- */
-goog.Promise.prototype.removeEntryAfter_ = function(previous) {
-  goog.asserts.assert(this.callbackEntries_);
-  goog.asserts.assert(previous != null);
-  // If the last entry is being removed, update the tail
-  if (previous.next == this.callbackEntriesTail_) {
-    this.callbackEntriesTail_ = previous;
-  }
-
-  previous.next = previous.next.next;
-};
-
-
-/**
- * Executes all pending callbacks for this Promise.
- *
- * @private
- */
-goog.Promise.prototype.executeCallbacks_ = function() {
-  var entry = null;
-  while (entry = this.popEntry_()) {
-    if (goog.Promise.LONG_STACK_TRACES) {
-      this.currentStep_++;
-    }
-    this.executeCallback_(entry, this.state_, this.result_);
-  }
-  this.executing_ = false;
-};
-
-
-/**
- * Executes a pending callback for this Promise. Invokes an {@code onFulfilled}
- * or {@code onRejected} callback based on the resolved state of the Promise.
- *
- * @param {!goog.Promise.CallbackEntry_} callbackEntry An entry containing the
- *     onFulfilled and/or onRejected callbacks for this step.
- * @param {goog.Promise.State_} state The resolution status of the Promise,
- *     either FULFILLED or REJECTED.
- * @param {*} result The resolved result of the Promise.
- * @private
- */
-goog.Promise.prototype.executeCallback_ = function(
-    callbackEntry, state, result) {
-  // When the parent is resolved/rejected, the child no longer needs to hold
-  // on to it, as the parent can no longer be cancelled.
-  if (callbackEntry.child) {
-    callbackEntry.child.parent_ = null;
-  }
-  if (state == goog.Promise.State_.FULFILLED) {
-    callbackEntry.onFulfilled.call(callbackEntry.context, result);
-  } else if (callbackEntry.onRejected != null) {
-    if (!callbackEntry.always) {
-      this.removeUnhandledRejection_();
-    }
-    callbackEntry.onRejected.call(callbackEntry.context, result);
-  }
-  goog.Promise.returnEntry_(callbackEntry);
-};
-
-
-/**
- * Records a stack trace entry for functions that call {@code then} or the
- * Promise constructor. May be disabled by unsetting {@code LONG_STACK_TRACES}.
- *
- * @param {!Error} err An Error object created by the calling function for
- *     providing a stack trace.
- * @private
- */
-goog.Promise.prototype.addStackTrace_ = function(err) {
-  if (goog.Promise.LONG_STACK_TRACES && goog.isString(err.stack)) {
-    // Extract the third line of the stack trace, which is the entry for the
-    // user function that called into Promise code.
-    var trace = err.stack.split('\n', 4)[3];
-    var message = err.message;
-
-    // Pad the message to align the traces.
-    message += Array(11 - message.length).join(' ');
-    this.stack_.push(message + trace);
-  }
-};
-
-
-/**
- * Adds extra stack trace information to an exception for the list of
- * asynchronous {@code then} calls that have been run for this Promise. Stack
- * trace information is recorded in {@see #addStackTrace_}, and appended to
- * rethrown errors when {@code LONG_STACK_TRACES} is enabled.
- *
- * @param {*} err An unhandled exception captured during callback execution.
- * @private
- */
-goog.Promise.prototype.appendLongStack_ = function(err) {
-  if (goog.Promise.LONG_STACK_TRACES &&
-      err && goog.isString(err.stack) && this.stack_.length) {
-    var longTrace = ['Promise trace:'];
-
-    for (var promise = this; promise; promise = promise.parent_) {
-      for (var i = this.currentStep_; i >= 0; i--) {
-        longTrace.push(promise.stack_[i]);
-      }
-      longTrace.push('Value: ' +
-          '[' + (promise.state_ == goog.Promise.State_.REJECTED ?
-              'REJECTED' : 'FULFILLED') + '] ' +
-          '<' + String(promise.result_) + '>');
-    }
-    err.stack += '\n\n' + longTrace.join('\n');
-  }
-};
-
-
-/**
- * Marks this rejected Promise as having being handled. Also marks any parent
- * Promises in the rejected state as handled. The rejection handler will no
- * longer be invoked for this Promise (if it has not been called already).
- *
- * @private
- */
-goog.Promise.prototype.removeUnhandledRejection_ = function() {
-  if (goog.Promise.UNHANDLED_REJECTION_DELAY > 0) {
-    for (var p = this; p && p.unhandledRejectionId_; p = p.parent_) {
-      goog.global.clearTimeout(p.unhandledRejectionId_);
-      p.unhandledRejectionId_ = 0;
-    }
-  } else if (goog.Promise.UNHANDLED_REJECTION_DELAY == 0) {
-    for (var p = this; p && p.hadUnhandledRejection_; p = p.parent_) {
-      p.hadUnhandledRejection_ = false;
-    }
-  }
-};
-
-
-/**
- * Marks this rejected Promise as unhandled. If no {@code onRejected} callback
- * is called for this Promise before the {@code UNHANDLED_REJECTION_DELAY}
- * expires, the reason will be passed to the unhandled rejection handler. The
- * handler typically rethrows the rejection reason so that it becomes visible in
- * the developer console.
- *
- * @param {!goog.Promise} promise The rejected Promise.
- * @param {*} reason The Promise rejection reason.
- * @private
- */
-goog.Promise.addUnhandledRejection_ = function(promise, reason) {
-  if (goog.Promise.UNHANDLED_REJECTION_DELAY > 0) {
-    promise.unhandledRejectionId_ = goog.global.setTimeout(function() {
-      promise.appendLongStack_(reason);
-      goog.Promise.handleRejection_.call(null, reason);
-    }, goog.Promise.UNHANDLED_REJECTION_DELAY);
-
-  } else if (goog.Promise.UNHANDLED_REJECTION_DELAY == 0) {
-    promise.hadUnhandledRejection_ = true;
-    goog.async.run(function() {
-      if (promise.hadUnhandledRejection_) {
-        promise.appendLongStack_(reason);
-        goog.Promise.handleRejection_.call(null, reason);
-      }
-    });
-  }
-};
-
-
-/**
- * A method that is invoked with the rejection reasons for Promises that are
- * rejected but have no {@code onRejected} callbacks registered yet.
- * @type {function(*)}
- * @private
- */
-goog.Promise.handleRejection_ = goog.async.throwException;
-
-
-/**
- * Sets a handler that will be called with reasons from unhandled rejected
- * Promises. If the rejected Promise (or one of its descendants) has an
- * {@code onRejected} callback registered, the rejection will be considered
- * handled, and the rejection handler will not be called.
- *
- * By default, unhandled rejections are rethrown so that the error may be
- * captured by the developer console or a {@code window.onerror} handler.
- *
- * @param {function(*)} handler A function that will be called with reasons from
- *     rejected Promises. Defaults to {@code goog.async.throwException}.
- */
-goog.Promise.setUnhandledRejectionHandler = function(handler) {
-  goog.Promise.handleRejection_ = handler;
-};
-
-
-
-/**
- * Error used as a rejection reason for canceled Promises.
- *
- * @param {string=} opt_message
- * @constructor
- * @extends {goog.debug.Error}
- * @final
- */
-goog.Promise.CancellationError = function(opt_message) {
-  goog.Promise.CancellationError.base(this, 'constructor', opt_message);
-};
-goog.inherits(goog.Promise.CancellationError, goog.debug.Error);
-
-
-/** @override */
-goog.Promise.CancellationError.prototype.name = 'cancel';
-
-
-
-/**
- * Internal implementation of the resolver interface.
- *
- * @param {!goog.Promise<TYPE>} promise
- * @param {function((TYPE|goog.Promise<TYPE>|Thenable)=)} resolve
- * @param {function(*): void} reject
- * @implements {goog.promise.Resolver<TYPE>}
- * @final @struct
- * @constructor
- * @private
- * @template TYPE
- */
-goog.Promise.Resolver_ = function(promise, resolve, reject) {
-  /** @const */
-  this.promise = promise;
-
-  /** @const */
-  this.resolve = resolve;
-
-  /** @const */
-  this.reject = reject;
-};