Gallery: Support RAW files in Gallery.

ui/file_manager/gallery/js/gallery_item_unittest.js

 // Copyright 2015 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.
 
 /**
  * Mock of ImageUtil.
  */
 var ImageUtil = {
   getMetricName: function() {},
   metrics: {
@@ skipping 172 matching lines @@
           item,
           {getLocationInfo: function() { return {}; }},
           getMockMetadataModel(),
           /* fallbackDir */ null,
           /* overwrite */ true,
           document.createElement('canvas'))).then(function(result) {
             assertFalse(result);
             assertFalse(writeOperationRun);
           }), callback);
 }
+
+function testSaveToFileRaw(callback) {
+  var fileSystem = new MockFileSystem('volumeId');
+  fileSystem.populate(['/test.arw']);
+  fileSystem.entries['/'].getFile = function(name, options, success, error) {
+    if (options.create) {
+      assertEquals('test - Edited.jpg', name);
+      fileSystem.populate(['/test - Edited.jpg']);
+      var entry = fileSystem.entries['/test - Edited.jpg'];
+      entry.createWriter = function(callback) {
+        callback({
+          write: function() {
+            Promise.resolve().then(function() {
+              this.onwriteend();
+            }.bind(this));
+          },
+          truncate: function() {
+            this.write();
+          }
+        });
+      };
+    }
+    MockDirectoryEntry.prototype.getFile.apply(this, arguments);
+  };
+  var entryChanged = false;
+  var metadataModel = getMockMetadataModel();
+  metadataModel.notifyEntriesChanged = function() {
+    entryChanged = true;
+  };
+
+  var item = new Gallery.Item(
+      fileSystem.entries['/test.arw'],
+      {isReadOnly: false},
+      {size: 100},
+      {},
+      /* original */ true);
+  assertEquals(100, item.getMetadataItem().size);
+  assertFalse(entryChanged);
+  reportPromise(
+      new Promise(item.saveToFile.bind(
+          item,
+          {getLocationInfo: function() { return {}; }},
+          metadataModel,
+          /* fallbackDir */ null,
+          /* overwrite is true but ignored */ true,
+          document.createElement('canvas'))).then(function(success) {
+            assertTrue(success);
+            assertEquals(200, item.getMetadataItem().size);
+            assertTrue(entryChanged);
+            assertFalse(item.isOriginal());
+          }), callback);
+}