Change ImageLoaderClient to return width and height of image.

ui/file_manager/image_loader/cache.js

Index: ui/file_manager/image_loader/cache.js
diff --git a/ui/file_manager/image_loader/cache.js b/ui/file_manager/image_loader/cache.js
index c66ae983bb3ae2dbb7b99dda107d9ce86d492b54..b9eb698238af5005e1869d3ba16a4987fbfb938e 100644
--- a/ui/file_manager/image_loader/cache.js
+++ b/ui/file_manager/image_loader/cache.js
@@ -27,7 +27,7 @@ Cache.DB_NAME = 'image-loader';
  * @type {number}
  * @const
  */
-Cache.DB_VERSION = 11;
+Cache.DB_VERSION = 12;
 
 /**
  * Memory limit for images data in bytes.
@@ -215,10 +215,12 @@ Cache.prototype.evictCache_ = function(
  *
  * @param {string} key Cache key.
  * @param {string} data Image data.
+ * @param {number} width Image width.
+ * @param {number} height Image height.
  * @param {number} timestamp Last modification timestamp. Used to detect
  *     if the cache entry becomes out of date.
  */
-Cache.prototype.saveImage = function(key, data, timestamp) {
+Cache.prototype.saveImage = function(key, data, width, height, timestamp) {
   if (!this.db_) {
     console.warn('Cache database not available.');
     return;
@@ -228,6 +230,8 @@ Cache.prototype.saveImage = function(key, data, timestamp) {
     var metadataEntry = {
       key: key,
       timestamp: timestamp,
+      width: width,
+      height: height,
       size: data.length,
       lastLoadTimestamp: Date.now()};
     var dataEntry = {key: key, data: data};
@@ -256,7 +260,8 @@ Cache.prototype.saveImage = function(key, data, timestamp) {
  * @param {string} key Cache key.
  * @param {number} timestamp Last modification timestamp. If different
  *     that the one in cache, then the entry will be invalidated.
- * @param {function(string)} onSuccess Success callback with the image's data.
+ * @param {function(string, number, number)} onSuccess Success callback with
+ *     the image's data, width, height.
  * @param {function()} onFailure Failure callback.
  */
 Cache.prototype.loadImage = function(key, timestamp, onSuccess, onFailure) {
@@ -303,7 +308,7 @@ Cache.prototype.loadImage = function(key, timestamp, onSuccess, onFailure) {
       // image data.
       metadataEntry.lastLoadTimestamp = Date.now();
       metadataStore.put(metadataEntry);  // Added asynchronously.
-      onSuccess(dataEntry.data);
+      onSuccess(dataEntry.data, metadataEntry.width, metadataEntry.height);
     }
   }.bind(this);