Enabled Mosaic view on each volume.

chrome/browser/resources/file_manager/js/photo/gallery.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.
 
 util.addPageLoadHandler(function() {
   if (!location.hash)
     return;
 
   var pageState;
   if (location.search) {
@@ skipping 119 matching lines @@
     urls.sort();
     Gallery.getFileBrowserPrivate().getStrings(function(strings) {
       loadTimeData.data = strings;
       var context = {
         readonlyDirName: null,
         curDirEntry: currentDir,
         saveDirEntry: null,
         metadataCache: MetadataCache.createFull(),
         pageState: pageState,
         onClose: onClose,
-        allowMosaic: true, /* For debugging purposes */
         displayStringFunction: strf
       };
       Gallery.open(context, urls, selectedUrls);
       if (opt_callback) opt_callback();
     });
   }
 };
 
 /**
  * Tools fade-out timeout im milliseconds.
+ * @const
  * @type {number}
  */
 Gallery.FADE_TIMEOUT = 3000;
 
 /**
  * First time tools fade-out timeout im milliseconds.
+ * @const
  * @type {number}
  */
 Gallery.FIRST_FADE_TIMEOUT = 1000;
 
 /**
+ * Time until mosaic is initialized in the background. Used to make gallery
+ * in the slide mode load faster. In miiliseconds.
+ * @const
+ * @type {number}
+ */
+Gallery.MOSAIC_BACKGROUND_INIT_DELAY = 1000;
+
+/**
  * Types of metadata Gallery uses (to query the metadata cache).
+ * @const
+ * @type {string}
  */
 Gallery.METADATA_TYPE = 'thumbnail|filesystem|media|streaming';
 
 /**
  * Initialize listeners.
  * @private
  */
-
 Gallery.prototype.initListeners_ = function() {
   if (!util.TEST_HARNESS)
     this.document_.oncontextmenu = function(e) { e.preventDefault(); };
 
   this.keyDownBound_ = this.onKeyDown_.bind(this);
   this.document_.body.addEventListener('keydown', this.keyDownBound_);
 
   this.inactivityWatcher_ = new MouseInactivityWatcher(
       this.container_, Gallery.FADE_TIMEOUT, this.hasActiveTool.bind(this));
 
@@ skipping 71 matching lines @@
   this.filenameEdit_.addEventListener('keydown',
       this.onFilenameEditKeydown_.bind(this));
 
   util.createChild(this.toolbar_, 'button-spacer');
 
   this.prompt_ = new ImageEditor.Prompt(
       this.container_, this.displayStringFunction_);
 
   var onThumbnailError = this.context_.onThumbnailError || function() {};
 
-  if (this.context_.allowMosaic) {
-    this.modeButton_ = util.createChild(this.toolbar_, 'button mode', 'button');
-    this.modeButton_.addEventListener('click',
-        this.toggleMode_.bind(this, null));
+  this.modeButton_ = util.createChild(this.toolbar_, 'button mode', 'button');
+  this.modeButton_.addEventListener('click',
+      this.toggleMode_.bind(this, null));
 
-    this.mosaicMode_ = new MosaicMode(content,
-        this.dataModel_, this.selectionModel_, this.metadataCache_,
-        this.toggleMode_.bind(this, null), onThumbnailError);
-  }
+  this.mosaicMode_ = new MosaicMode(content,
+      this.dataModel_, this.selectionModel_, this.metadataCache_,
+      this.toggleMode_.bind(this, null), onThumbnailError);
 
   this.slideMode_ = new SlideMode(this.container_, content,
       this.toolbar_, this.prompt_,
       this.dataModel_, this.selectionModel_, this.context_,
       this.toggleMode_.bind(this), onThumbnailError,
       this.displayStringFunction_);
   this.slideMode_.addEventListener('image-displayed', function() {
     cr.dispatchSimpleEvent(this, 'image-displayed');
   }.bind(this));
   this.slideMode_.addEventListener('image-saved', function() {
@@ skipping 75 matching lines @@
       (this.context_.pageState &&
           this.context_.pageState.gallery == 'mosaic'))) {
     this.setCurrentMode_(this.mosaicMode_);
     mosaic.init();
     mosaic.show();
     this.inactivityWatcher_.check();  // Show the toolbar.
     cr.dispatchSimpleEvent(this, 'loaded');
   } else {
     this.setCurrentMode_(this.slideMode_);
     var maybeLoadMosaic = function() {
-      if (mosaic) mosaic.init();
+      if (mosaic)
+        mosaic.init();
       cr.dispatchSimpleEvent(this, 'loaded');
     }.bind(this);
     /* TODO: consider nice blow-up animation for the first image */
     this.slideMode_.enter(null, function() {
         // Flash the toolbar briefly to show it is there.
         this.inactivityWatcher_.kick(Gallery.FIRST_FADE_TIMEOUT);
       }.bind(this),
       maybeLoadMosaic);
   }
 };
@@ skipping 507 matching lines @@
 Gallery.prototype.updateThumbnails_ = function() {
   if (this.currentMode_ == this.slideMode_)
     this.slideMode_.updateThumbnails();
 
   if (this.mosaicMode_) {
     var mosaic = this.mosaicMode_.getMosaic();
     if (mosaic.isInitialized())
       mosaic.reload();
   }
 };