Preliminary implementation of Google-style dialogs in ash::internal::DialogFrameView

chrome/browser/resources/options2/options_page.css

 #main-content {
   display: -webkit-box;
   position: absolute;
   left: 0;
   right: 0;
   top: 0;
   bottom: 0;
 }
 
 #mainview {
@@ skipping 139 matching lines @@
 .raw-button:active {
   -webkit-box-shadow: none;
   background-color: transparent;
   background-repeat: no-repeat;
   border: none;
   min-width: 0;
   padding: 1px 6px;
 }
 
 .close-subpage {
-  background-image: url('chrome://theme/IDR_CLOSE_BAR');
+  background-image: url('../../../../ui/resources/close_bar.png');
   height: 16px;
   min-width: 0;
   position: relative;
   top: 16px;
   width: 16px;
 }
 
 .close-subpage:hover {
-  background-image: url('chrome://theme/IDR_CLOSE_BAR_H');
+  background-image: url('../../../../ui/resources/close_bar_h.png');
 }
 
 .close-subpage:active {
-  background-image: url('chrome://theme/IDR_CLOSE_BAR_P');
+  background-image: url('../../../../ui/resources/close_bar_p.png');
 }
 
 html[dir='ltr'] .close-subpage {
   float: right;
   right: 20px;
 }
 
 html[dir='rtl'] .close-subpage {
   float: left;
   left: 20px;
@@ skipping 284 matching lines @@
   -webkit-box-align: center;
   -webkit-box-flex: 1;
   -webkit-padding-end: 5px;
   display: -webkit-box;
 }
 
 list .close-button {
   -webkit-transition: 150ms opacity;
   background-color: transparent;
   /* TODO(stuartmorgan): Replace with real images once they are available. */
-  background-image: url("../../../app/theme/close_bar.png");
+  background-image: url("../../../../ui/resources/close_bar.png");
   border: none;
   display: block;
   height: 16px;
   opacity: 1;
   width: 16px;
 }
 
 list > *:not(:hover):not([lead]) .close-button,
 list > *:not(:hover):not([selected]) .close-button,
 list:not([hasElementFocus]) > *:not(:hover) .close-button,
 list[disabled] .close-button,
 list .close-button[disabled] {
   opacity: 0;
   pointer-events: none;
 }
 
 list .close-button:hover {
-  background-image: url("../../../app/theme/close_bar_h.png");
+  background-image: url("../../../../ui/resources/close_bar_h.png");
 }
 
 list .close-button:active {
-  background-image: url("../../../app/theme/close_bar_p.png");
+  background-image: url("../../../../ui/resources/close_bar_p.png");
 }
 
 list .static-text {
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
 
 list[inlineeditable] input {
   box-sizing: border-box;
@@ skipping 225 matching lines @@
       url('chrome://theme/IDR_CONTROLLED_SETTING_RECOMMENDED_LARGE');
 }
 
 html[dir='rtl'] .controlled-setting-bubble-text {
   background-position: right top;
 }
 
 .controlled-setting-bubble-action {
   padding: 0 !important;
 }