[Photo Editor] Make exif encoder more tolerant to non-standard EXIF data

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

Index: chrome/browser/resources/file_manager/js/image_editor/exif_encoder.js
diff --git a/chrome/browser/resources/file_manager/js/image_editor/exif_encoder.js b/chrome/browser/resources/file_manager/js/image_editor/exif_encoder.js
index 2a056db802fe93bc47d233698bb07382be3a6499..7570c2bb277019381ba0ce0048be87305aef0231 100644
--- a/chrome/browser/resources/file_manager/js/image_editor/exif_encoder.js
+++ b/chrome/browser/resources/file_manager/js/image_editor/exif_encoder.js
@@ -321,8 +321,11 @@ ExifEncoder.encodeDirectory = function(
   }
 };
 
-// TODO(kaznacheev): Share with ExifParser?
-// TODO(JSDOC)
+/**
+ * @param {Object} tag EXIF tag object.

[Dmitry Zvorygin, 2012/07/25 17:41:20]

I'd recommend you to use extended notation:

@param {{format:number, id:number}}

+ * @return {number} Width in bytes of the data unit associated with this tag.
+ * TODO(kaznacheev): Share with ExifParser?
+ */
 ExifEncoder.getComponentWidth = function(tag) {
   switch (tag.format) {
     case 1:  // Byte
@@ -342,7 +345,7 @@ ExifEncoder.getComponentWidth = function(tag) {
       return 8;
 
     default:  // ???
-      throw new Error('Unknown tag format 0x' +
+      console.warn('Unknown tag format 0x' +
           Number(tag.id).toString(16) + ': ' + tag.format);
       return 4;
   }
@@ -383,7 +386,13 @@ ExifEncoder.writeValue = function(bw, tag) {
   }
 };
 
-//TODO(JSDOC)
+/**
+ * @param {Object} directory EXIF directory.

[Dmitry Zvorygin, 2012/07/25 17:41:20]

{Object.<number, Object>}

+ * @param {number} id Tag id.
+ * @param {number} format Tag format (used in getComponentWidth).

[Dmitry Zvorygin, 2012/07/25 17:41:20]

... format used in {@link ExifEncoder#getComponentWidth}

+ * @param {number} componentCount Number of components in this tag.
+ * @return {Object} Tag found or created.

[Dmitry Zvorygin, 2012/07/25 17:41:20]

@return {{id:number, format:number, componentCount:number}}

+ */
 ExifEncoder.findOrCreateTag = function(directory, id, format, componentCount) {
   if (!(id in directory)) {
     directory[id] = {