Add a has_media flag to VolumeMetadata.

chrome/test/data/extensions/api_test/file_browser/mount_test/test.js

Index: chrome/test/data/extensions/api_test/file_browser/mount_test/test.js
diff --git a/chrome/test/data/extensions/api_test/file_browser/mount_test/test.js b/chrome/test/data/extensions/api_test/file_browser/mount_test/test.js
index 9b317218384370efc2f8a93007d64b8dfd1e8f20..ff093636d55b3c93d5dd8916bff6fbb59a362093 100644
--- a/chrome/test/data/extensions/api_test/file_browser/mount_test/test.js
+++ b/chrome/test/data/extensions/api_test/file_browser/mount_test/test.js
@@ -12,6 +12,7 @@ var expectedVolume1 = {
   devicePath: 'system_path_prefix1',
   isParentDevice: false,
   isReadOnly: false,
+  hasMedia: false,
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
@@ -24,6 +25,7 @@ var expectedVolume2 = {
   devicePath: 'system_path_prefix2',
   isParentDevice: true,
   isReadOnly: true,
+  hasMedia: true,
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
@@ -36,6 +38,7 @@ var expectedVolume3 = {
   devicePath: 'system_path_prefix3',
   isParentDevice: true,
   isReadOnly: false,
+  hasMedia: false,
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
@@ -44,6 +47,7 @@ var expectedDownloadsVolume = {
   volumeLabel: '',
   volumeType: 'downloads',
   isReadOnly: false,
+  hasMedia: false,
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
@@ -53,6 +57,7 @@ var expectedDriveVolume = {
   sourcePath: /^\/special\/drive[^\/]*$/,
   volumeType: 'drive',
   isReadOnly: false,
+  hasMedia: false,
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
@@ -62,6 +67,7 @@ var expectedArchiveVolume = {
   sourcePath: /removable\/mount_path3\/archive.zip$/,
   volumeType: 'archive',
   isReadOnly: true,
+  hasMedia: false,
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };