[piexwasm] Remove id member from Piex JS objects

The id was a hangover from a time when PIEX image extraction used NaCl
to do thumbnail image extraction. It serves no purpose: remove it from
@typedefs and object properties. Reformat @typedefs for consistency.

No change in behavior, no new tests.

Bug: 1039141
Change-Id: I8c50b7e5906ce3763ba2396b677b7f74f1ec4a09
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062014Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742466}

ui/file_manager/image_loader/piex_loader.js

@@ -58,7 +58,6 @@ function wasmModuleFailed() {
 
 /**
  * @typedef {{
- *   id: number,
  *  thumbnail: !ArrayBuffer,
  *  mimeType: (string|undefined),
  *  orientation: number,
@@ -69,18 +68,11 @@ function wasmModuleFailed() {
 let ImagePreviewResponseData;
 
 /**
- *
  * @param {!ImagePreviewResponseData} data The preview image data.
  * @constructor
  * @struct
  */
 function PiexLoaderResponse(data) {
-  /**
-   * @public {number}
-   * @const
-   */
-  this.id = data.id;
-
   /**
    * @public {!ArrayBuffer}
    * @const
@@ -107,7 +99,7 @@ function PiexLoaderResponse(data) {
   this.colorSpace = data.colorSpace;
 
   /**
-   * JSON encoded RAW image photographic details (Piex Wasm module only).
+   * JSON encoded RAW image photographic details.
    * @public {?string}
    * @const
    */
@@ -120,10 +112,7 @@ function PiexLoaderResponse(data) {
  * @struct
  */
 function PiexLoader() {
-  /**
-   * @private {number}
-   */
-  this.requestIdCount_ = 0;
+  // TODO(crbug.com/1039141): make this an ES6 class.
 }
 
 /**
@@ -220,16 +209,8 @@ let PiexWasmImageResult;
 class ImageBuffer {
   /**
    * @param {!ArrayBuffer} buffer - raw image source data.
-   * @param {number} id - caller-defined id.
    */
-  constructor(buffer, id) {
-    /**
-     * @type {number}
-     * @const
-     * @private
-     */
-    this.id = id;
-
+  constructor(buffer) {
     /**
      * @type {!Uint8Array}
      * @const
@@ -301,7 +282,6 @@ class ImageBuffer {
       ifd: this.details(result, preview.orientation),
       orientation: preview.orientation,
       colorSpace: preview.colorSpace,
-      id: this.id,
     };
   }
 
@@ -322,7 +302,6 @@ class ImageBuffer {
         thumbnail: new ArrayBuffer(0),
         colorSpace: ColorSpace.SRGB,
         orientation: 1,
-        id: this.id,
         ifd: null,
       };
     }
@@ -344,7 +323,6 @@ class ImageBuffer {
       ifd: this.details(result, thumbnail.orientation),
       orientation: thumbnail.orientation,
       colorSpace: thumbnail.colorSpace,
-      id: this.id,
     };
   }
 
@@ -365,7 +343,6 @@ class ImageBuffer {
         thumbnail: new ArrayBuffer(0),
         colorSpace: ColorSpace.SRGB,
         orientation: 1,
-        id: this.id,
         ifd: null,
       };
     }
@@ -440,7 +417,6 @@ class ImageBuffer {
       ifd: this.details(result, thumbnail.orientation),
       orientation: thumbnail.orientation,
       colorSpace: thumbnail.colorSpace,
-      id: this.id,
     };
   }
 
@@ -497,15 +473,14 @@ class ImageBuffer {
  * @return {!Promise<!PiexLoaderResponse>}
  */
 PiexLoader.prototype.load = function(url) {
-  const requestId = this.requestIdCount_++;
-
   let imageBuffer;
+
   return readFromFileSystem(url)
       .then((buffer) => {
         if (wasmModuleFailed() === true) {
           return Promise.reject('piex wasm module failed');
         }
-        imageBuffer = new ImageBuffer(buffer, requestId);
+        imageBuffer = new ImageBuffer(buffer);
         return imageBuffer.process();
       })
       .then((result) => {