[NOT FOR COMMIT] Use chrome://gdata in Photo Editor

chrome/browser/resources/file_manager/js/image_editor/image_view.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.
 
 /**
  * The overlay displaying the image.
  */
 function ImageView(container, viewport, metadataProvider) {
   this.container_ = container;
   this.viewport_ = viewport;
@@ skipping 251 matching lines @@
       mainImageSlide = 0;
     } else {
       // Thumbnail image load failed, loading the main image immediately.
       mainImageLoadDelay = 0;
     }
     loadMainImage(loadType, mainImageSlide, source,
         canvas.width != 0, mainImageLoadDelay);
   }
 
   function loadMainImage(loadType, slide, contentURL, previewShown, delay) {
+    contentURL = metadata.cachedURL || contentURL;
     if (self.prefetchLoader_.isLoading(contentURL)) {
       // The image we need is already being prefetched. Initiating another load
       // would be a waste. Hijack the load instead by overriding the callback.
       self.prefetchLoader_.setCallback(
           displayMainImage.bind(null, loadType, slide, previewShown));
 
       // Swap the loaders so that the self.isLoading works correctly.
       var temp = self.prefetchLoader_;
       self.prefetchLoader_ = self.imageLoader_;
       self.imageLoader_ = temp;
@@ skipping 64 matching lines @@
 
   var cached = this.getReadyContent(id, source);
   if (cached) {
     prefetchDone(cached);
   } else if (FileType.getMediaType(source) == 'image') {
     // Evict the LRU item before we allocate the new canvas to avoid unneeded
     // strain on memory.
     this.contentCache_.evictLRU();
 
     this.prefetchLoader_.load(
-        source,
+        metadata.cachedURL || source,
         this.localImageTransformFetcher_,
         prefetchDone,
         ImageView.ANIMATION_WAIT_INTERVAL);
   }
 };
 
 ImageView.prototype.replaceContent_ = function(
     content, opt_reuseScreenCanvas, opt_width, opt_height, opt_preview) {
 
   if (content.constructor.name == 'HTMLVideoElement') {
@@ skipping 203 matching lines @@
   if (this.order_.length > this.capacity_)
     throw new Error('Exceeded cache capacity');
 };
 
 ImageView.Cache.prototype.evictLRU = function() {
   if (this.order_.length == this.capacity_) {
     var id = this.order_.shift();
     delete this.map_[id];
   }
 };