Implement Files.app V2 new scrollbars and bottom bar.

This patch adds new scrollbars and restyles the preview images to match the recent specs.

TEST=Run chrome with --file-manager-new-ui, launch Files.app and verify.
BUG=226912


Review URL: https://chromiumcodereview.appspot.com/13783003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193010 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/file_manager/css/file_manager.css

@@ -38,6 +38,19 @@ body.loaded {
   opacity: 0.8;
 }
 
+body[new-ui] ::-webkit-scrollbar {
+  height: 8px;
+  width: 8px;
+}
+
+body[new-ui] ::-webkit-scrollbar-track {
+  padding: 5px;
+}
+
+body[new-ui] ::-webkit-scrollbar-thumb {
+  background-color: rgb(180, 180, 180);
+}
+
 #butter-bar-container {
   -webkit-box-pack: center;
   display: -webkit-box;
@@ -1097,6 +1110,8 @@ input.rename {
 body[new-ui] .preview-panel {
   background-color: white;
   border-top: 1px solid #d4d4d4;
+  height: 51px;
+  padding: 0 12px 0 7px;
 }
 
 .preview-panel[visibility=hiding] {
@@ -1117,6 +1132,11 @@ body[new-ui] .preview-panel {
   padding-left: 39px;
 }
 
+body[new-ui] .preview-thumbnails {
+  padding-left: 25px;
+}
+
+
 .preview-thumbnails > .thumbnail {
   -webkit-box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
   background-color: #f2f2f2;
@@ -1127,6 +1147,14 @@ body[new-ui] .preview-panel {
   width: 45px;
 }
 
+body[new-ui] .preview-thumbnails > .thumbnail {
+  -webkit-box-shadow: 0 1px 1px rgba(80, 80, 80, 0.5);
+  border: 1px solid #fff;
+  height: 35px;
+  margin: 0 0 0 -25px;  /* Overlapped images. */
+  width: 35px;
+}
+
 body[new-ui] .preview-thumbnails > .thumbnail {
   background-color: white;
 }
@@ -1139,6 +1167,14 @@ body[new-ui] .preview-thumbnails > .thumbnail {
   width: 45px;
 }
 
+body[new-ui] .preview-thumbnails > .thumbnail > .img-container {
+  -webkit-box-sizing: border-box;
+  background-size: 35px 35px;
+  border: 1px solid white;
+  height: 35px;
+  width: 35px;
+}
+
 .preview-thumbnails > .popup {
   -webkit-transform: translate(0, 3px) scale(0.95);
   background-color: #f2f2f2;