[filebrowser] Save sorting field/order for modal dialogs, show spinner when scanning directories.

chrome/browser/resources/file_manager/images/spinner.svg

Index: chrome/browser/resources/file_manager/images/spinner.svg
===================================================================
--- chrome/browser/resources/file_manager/images/spinner.svg	(revision 0)
+++ chrome/browser/resources/file_manager/images/spinner.svg	(revision 0)
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg viewBox="0 0 100 100" version="1.1"
+  xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <g stroke-opacity="0" transform="translate(50,50)">
+    <animateTransform attributeName="transform" attributeType="XML"
+      additive="sum" type="rotate"
+      calcMode="discrete"  values="30;60;90;120;150;180;210;240;270;300;330;360"
+      begin="0s" dur="1s" fill="freeze" repeatCount="indefinite" />
+    <path d="M49.931,-2.617
+      a 50,50 0 0,0 -5.381,-20.083
+      l -17.82,9.08
+      a 50 50 0 0,1 3.229,12.05
+      l 19.973,-1.047"
+      fill-opacity = "1"/>
+    <path d="M41.934,-27.232
+      a 50,50 0 0,0 -14.702,-14.702
+      l -10.893,16.773
+      a 50 50 0 0,1 8.821,8.821
+      l 16.773,-10.893"
+      fill-opacity = "0.793"/>
+    <path d="M22.7,-44.55
+      a 50,50 0 0,0 -20.083,-5.381
+      l -1.047,19.973
+      a 50 50 0 0,1 12.05,3.229
+      l 9.08,-17.82"
+      fill-opacity = "0.621"/>
+    <path d="M-2.617,-49.931
+      a 50,50 0 0,0 -20.083,5.381
+      l 9.08,17.82
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+    <path d="M-27.232,-41.934
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+      fill-opacity = "0.367"/>
+    <path d="M-44.55,-22.7
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+    <path d="M-49.931,2.617
+      a 50,50 0 0,0 5.381,20.083
+      l 17.82,-9.08
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+    <path d="M-41.934,27.232
+      a 50,50 0 0,0 14.702,14.702
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+      a 50 50 0 0,1 -8.821,-8.821
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+    <path d="M44.55,22.7
+      a 50,50 0 0,0 5.381,-20.083
+      l -19.973,-1.047
+      a 50 50 0 0,1 -3.229,12.05
+      l 17.82,9.08"
+      fill-opacity = "0.101"/>
+  </g>
+</svg>