Drive: Add "Clear Local Cache" in the Gear menu to clear all local cache of Drive.

chrome/browser/resources/file_manager/js/file_manager.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.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 575 matching lines @@
     this.searchBreadcrumbs_ = new BreadcrumbsController(
          this.dialogDom_.querySelector('#search-breadcrumbs'));
     this.searchBreadcrumbs_.addEventListener(
          'pathclick', this.onBreadcrumbClick_.bind(this));
     this.searchBreadcrumbs_.setHideLast(true);
 
     cr.ui.Table.decorate(this.table_);
     cr.ui.Grid.decorate(this.grid_);
 
     this.document_.addEventListener('keydown', this.onKeyDown_.bind(this));
+    this.document_.addEventListener('keyup', this.onKeyUp_.bind(this));
     // Disable the default browser context menu.
     this.document_.addEventListener('contextmenu',
                                     function(e) { e.preventDefault() });
 
     this.renameInput_ = this.document_.createElement('input');
     this.renameInput_.className = 'rename';
 
     this.renameInput_.addEventListener(
         'keydown', this.onRenameInputKeyDown_.bind(this));
     this.renameInput_.addEventListener(
@@ skipping 364 matching lines @@
                this.directoryModel_.getCurrentRootType() == RootType.REMOVABLE;
 
       case 'format':
         return this.directoryModel_.getCurrentRootType() == RootType.REMOVABLE;
 
       case 'import-photos':
         return this.directoryModel_.getCurrentRootType() != RootType.GDATA;
 
       case 'gdata-help':
       case 'gdata-buy-more-space':
+      case 'gdata-clear-local-cache':
         return this.isOnGData();
     }
   };
 
   FileManager.prototype.getRootEntry_ = function(index) {
     if (index == -1)
       return null;
 
     return this.rootsList_.dataModel.item(index);
   };
@@ skipping 311 matching lines @@
             '#' + this.directoryModel_.getCurrentRootPath()});
         return;
 
       case 'gdata-buy-more-space':
         window.open(GOOGLE_DRIVE_BUY_STORAGE, 'buy-more-space');
         return;
 
       case 'gdata-help':
         window.open(GOOGLE_DRIVE_HELP, 'help');
         return;
+
+      case 'gdata-clear-local-cache':
+        chrome.fileBrowserPrivate.clearDriveCache();
+        return;
     }
   };
 
   /**
    * Respond to the back and forward buttons.
    */
   FileManager.prototype.onPopState_ = function(event) {
     this.closeFilePopup_();
     this.setupCurrentDirectory_(false /* page loading */);
   };
@@ skipping 1897 matching lines @@
   /**
    * KeyDown event handler for the document.
    */
   FileManager.prototype.onKeyDown_ = function(event) {
     if (event.srcElement === this.renameInput_) {
       // Ignore keydown handler in the rename input box.
       return;
     }
 
     switch (util.getKeyModifiers(event) + event.keyCode) {
+      case 'Ctrl-17':  // Ctrl => Show hidden setting
+        this.dialogDom_.setAttribute('ctrl-pressing', 'true');
+        return;
+
       case 'Ctrl-190':  // Ctrl-. => Toggle filter files.
         var dm = this.directoryModel_;
         dm.setFilterHidden(!dm.isFilterHiddenOn());
         event.preventDefault();
         return;
 
       case '27':  // Escape => Cancel dialog.
         if (this.copyManager_ &&
             this.copyManager_.getStatus().totalFiles != 0) {
           // If there is a copy in progress, ESC will cancel it.
@@ skipping 10 matching lines @@
         if (this.dialogType_ != FileManager.DialogType.FULL_PAGE) {
           // If there is nothing else for ESC to do, then cancel the dialog.
           event.preventDefault();
           this.cancelButton_.click();
         }
         break;
     }
   };
 
   /**
+   * KeyUp event handler for the document.
+   */
+  FileManager.prototype.onKeyUp_ = function(event) {
+    if (event.srcElement === this.renameInput_) {
+      // Ignore keydown handler in the rename input box.
+      return;
+    }
+
+    switch (util.getKeyModifiers(event) + event.keyCode) {
+      case '17':  // Ctrl => Hide hidden setting
+        this.dialogDom_.removeAttribute('ctrl-pressing');
+        return;
+    }
+  }
+
+  /**
    * KeyDown event handler for the div#list-container element.
    */
   FileManager.prototype.onListKeyDown_ = function(event) {
     if (event.srcElement.tagName == 'INPUT') {
       // Ignore keydown handler in the rename input box.
       return;
     }
 
     var self = this;
     function handleCommand(name) {
@@ skipping 784 matching lines @@
     }
 
     var defaultActionSeparator =
         this.dialogDom_.querySelector('#default-action-separator');
 
     this.defaultActionMenuItem_.hidden = !taskItem;
     defaultActionSeparator.hidden = !taskItem;
   }
 })();