Revert 182285

chrome/browser/resources/file_manager/js/image_editor/image_encoder.js

 // Copyright (c) 2012 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.
 
 /**
  * A namespace class for image encoding functions. All methods are static.
  */
 function ImageEncoder() {}
 
-//TODO(JSDOC)
+/**
+ * @type {Array.<Object>}
+ */
 ImageEncoder.metadataEncoders = {};
 
-//TODO(JSDOC)
+/**
+ * @param {function(new:ImageEncoder.MetadataEncoder)} constructor
+ *     //TODO(JSDOC).
+ * @param {string} mimeType  //TODO(JSDOC).
+ */
 ImageEncoder.registerMetadataEncoder = function(constructor, mimeType) {
   ImageEncoder.metadataEncoders[mimeType] = constructor;
 };
 
 /**
  * Create a metadata encoder.
  *
  * The encoder will own and modify a copy of the original metadata.
  *
  * @param {Object} metadata Original metadata.
@@ skipping 110 matching lines @@
   thumbnailCanvas.height = Math.round(canvas.height / opt_shrinkage);
 
   var context = thumbnailCanvas.getContext('2d');
   context.drawImage(canvas,
       0, 0, canvas.width, canvas.height,
       0, 0, thumbnailCanvas.width, thumbnailCanvas.height);
 
   return thumbnailCanvas;
 };
 
+/**
+ * TODO(JSDOC)
+ * @param {string} string  //TODO(JSDOC).
+ * @param {number} from  //TODO(JSDOC).
+ * @param {number} to  //TODO(JSDOC).
+ * @return {ArrayBuffer}  //TODO(JSDOC).
+ */
 ImageEncoder.stringToArrayBuffer = function(string, from, to) {
   var size = to - from;
   var array = new Uint8Array(size);
   for (var i = 0; i != size; i++) {
     array[i] = string.charCodeAt(from + i);
   }
   return array.buffer;
 };
 
 /**
  * A base class for a metadata encoder.
  *
  * Serves as a default metadata encoder for images that none of the metadata
  * parsers recognized.
  *
  * @constructor
  * @param {Object} original_metadata Starting metadata.
  */
 ImageEncoder.MetadataEncoder = function(original_metadata) {
   this.metadata_ = ImageUtil.deepCopy(original_metadata) || {};
   if (this.metadata_.mimeType != 'image/jpeg') {
     // Chrome can only encode JPEG and PNG. Force PNG mime type so that we
     // can save to file and generate a thumbnail.
     this.metadata_.mimeType = 'image/png';
   }
 };
 
+/**
+ * TODO(JSDOC)
+ * @return {Object}   //TODO(JSDOC).
+ */
 ImageEncoder.MetadataEncoder.prototype.getMetadata = function() {
   return this.metadata_;
 };
 
 /**
  * @param {HTMLCanvasElement|Object} canvas Canvas or or anything with
  *                                          width and height properties.
  */
 ImageEncoder.MetadataEncoder.prototype.setImageData = function(canvas) {
   this.metadata_.width = canvas.width;
@@ skipping 19 matching lines @@
     findInsertionRange = function(encodedImage) { return {from: 0, to: 0} };
 
 /**
  * Return serialized metadata ready to write to an image file.
  * The return type is optimized for passing to Blob.append.
  * @return {ArrayBuffer} //TODO(JSDOC).
  */
 ImageEncoder.MetadataEncoder.prototype.encode = function() {
   return new Uint8Array(0).buffer;
 };