Reapply "Media Galleries API Metadata: Image metadata"

chrome/test/data/extensions/api_test/media_galleries/media_metadata/test.js

 // Copyright 2014 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.
 
 var mediaGalleries = chrome.mediaGalleries;
 
 function RunMetadataTest(filename, callOptions, verifyMetadataFunction) {
   function getMediaFileSystemsCallback(results) {
     chrome.test.assertEq(1, results.length);
     var gallery = results[0];
@@ skipping 14 matching lines @@
 
 function ImageMIMETypeOnlyTest() {
   function verifyMetadata(metadata) {
     chrome.test.assertEq("image/jpeg", metadata.mimeType);
     chrome.test.succeed();
   }
 
   RunMetadataTest("test.jpg", {metadataType: 'mimeTypeOnly'}, verifyMetadata);
 }
 
+function ImageTagsTest() {
+  function verifyMetadata(metadata) {
+    chrome.test.assertEq("image/jpeg", metadata.mimeType);
+    chrome.test.assertEq(5616, metadata.width);
+    chrome.test.assertEq(3744, metadata.height);
+    chrome.test.assertEq(0, metadata.rotation);
+    chrome.test.assertEq(300.0, metadata.xResolution);
+    chrome.test.assertEq(300.0, metadata.yResolution);
+    chrome.test.assertEq("Canon", metadata.cameraMake);
+    chrome.test.assertEq("Canon EOS 5D Mark II", metadata.cameraModel);
+    chrome.test.assertEq(0.01, metadata.exposureTimeSeconds);
+    chrome.test.assertFalse(metadata.flashFired);
+    chrome.test.assertEq(3.2, metadata.fNumber);
+    chrome.test.assertEq(100, metadata.focalLengthMm);
+    chrome.test.assertEq(1600, metadata.isoEquivalent);
+    chrome.test.succeed();
+  }
+
+  RunMetadataTest("test.jpg", {}, verifyMetadata);
+}
+
 function MP3MIMETypeOnlyTest() {
   function verifyMetadata(metadata) {
     chrome.test.assertEq("audio/mpeg", metadata.mimeType);
     chrome.test.assertEq(undefined, metadata.title);
     chrome.test.succeed();
   }
 
   RunMetadataTest("id3_png_test.mp3", {metadataType: 'mimeTypeOnly'},
                   verifyMetadata);
 }
@@ skipping 40 matching lines @@
 
   return RunMetadataTest("90rotation.mp4", {}, verifyMetadata);
 }
 
 chrome.test.getConfig(function(config) {
   var customArg = JSON.parse(config.customArg);
   var useProprietaryCodecs = customArg[0];
 
   // Should still be able to sniff MP3 MIME type without proprietary codecs.
   var testsToRun = [
-    ImageMIMETypeOnlyTest
+    ImageMIMETypeOnlyTest,
+    ImageTagsTest
   ];
 
   if (useProprietaryCodecs) {
     testsToRun = testsToRun.concat([
       MP3MIMETypeOnlyTest,
       MP3TagsTest,
       RotatedVideoTest
     ]);
   }
 
   chrome.test.runTests(testsToRun);
 });