Remove unused icon assets from theme_resources.grd.

Now that Files.app has own file-type icons with Material Design, many icons in
theme_resources.grd are not in use.

BUG=none
TEST=full build and run browser_tests

Review URL: https://codereview.chromium.org/937373002

Cr-Commit-Position: refs/heads/master@{#317743}

chrome/app/theme/theme_resources.grd

@@ -271,52 +271,12 @@
       </if>
       <structure type="chrome_scaled_image" name="IDR_FILE_FOLDER" file="common/folder.png" />
       <if expr="chromeos">
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_ARCHIVE" file="cros/file_types/archive.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_ARCHIVE_WHITE" file="cros/file_types/archive_white.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_AUDIO" file="cros/file_types/audio.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_AUDIO_WHITE" file="cros/file_types/audio_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_DRIVE" file="cros/file_types/drive.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_EXCEL" file="cros/file_types/excel.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_EXCEL_WHITE" file="cros/file_types/excel_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_FOLDER" file="cros/file_types/folder.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_FOLDER_WHITE" file="cros/file_types/folder_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_FOLDER_SHARED" file="cros/file_types/folder_shared.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_FOLDER_SHARED_WHITE" file="cros/file_types/folder_shared_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_FORM" file="cros/file_types/form.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_FORM_WHITE" file="cros/file_types/form_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GDOC" file="cros/file_types/gdoc.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GDOC_WHITE" file="cros/file_types/gdoc_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GDRAW" file="cros/file_types/gdraw.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GDRAW_WHITE" file="cros/file_types/gdraw_white.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_GENERIC" file="cros/file_types/generic.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GENERIC_WHITE" file="cros/file_types/generic_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GLINK" file="cros/file_types/glink.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GLINK_WHITE" file="cros/file_types/glink_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GMAP" file="cros/file_types/gmap.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GMAP_WHITE" file="cros/file_types/gmap_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GSHEET" file="cros/file_types/gsheet.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GSHEET_WHITE" file="cros/file_types/gsheet_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GSLIDES" file="cros/file_types/gslides.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GSLIDES_WHITE" file="cros/file_types/gslides_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GTABLE" file="cros/file_types/gtable.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_GTABLE_WHITE" file="cros/file_types/gtable_white.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_IMAGE" file="cros/file_types/image.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_IMAGE_WHITE" file="cros/file_types/image_white.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_PDF" file="cros/file_types/pdf.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_PDF_WHITE" file="cros/file_types/pdf_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_PPT" file="cros/file_types/ppt.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_PPT_WHITE" file="cros/file_types/ppt_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_SCRIPT" file="cros/file_types/script.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_SCRIPT_WHITE" file="cros/file_types/script_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_SITES" file="cros/file_types/sites.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_SITES_WHITE" file="cros/file_types/sites_white.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_VIDEO" file="cros/file_types/video.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_VIDEO_WHITE" file="cros/file_types/video_white.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_WORD" file="cros/file_types/word.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_WORD_WHITE" file="cros/file_types/word_white.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_LARGE_AUDIO" file="cros/file_types/thumbnails/audio.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_LARGE_FOLDER" file="cros/file_types/thumbnails/folder.png" />
-        <structure type="chrome_scaled_image" name="IDR_FILETYPE_LARGE_FOLDER_SHARED" file="cros/file_types/thumbnails/folder_shared.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_LARGE_GENERIC" file="cros/file_types/thumbnails/generic.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_LARGE_IMAGE" file="cros/file_types/thumbnails/image.png" />
         <structure type="chrome_scaled_image" name="IDR_FILETYPE_LARGE_VIDEO" file="cros/file_types/thumbnails/video.png" />

ui/file_manager/file_manager/foreground/css/file_types.css

@@ -151,12 +151,6 @@ tree .tree-item[selected] > .tree-row > .shared[file-type-icon='folder'] {
       url(../images/filetype/2x/filetype_word.png) 2x);
 }
 
-[file-type-icon='drive'] {
-  background-image: -webkit-image-set(
-      url(chrome://theme/IDR_FILETYPE_DRIVE) 1x,
-      url(chrome://theme/IDR_FILETYPE_DRIVE@2x) 2x);
-}
-
 /* Large generic thumbnails, used when a file does not have a thumbnail. */
 [generic-thumbnail] {
   background-image: -webkit-image-set(