Clean-up: Change chrome/browser's CSS time units from s to ms.

chrome/browser/resources/print_preview/print_preview.css

Index: chrome/browser/resources/print_preview/print_preview.css
diff --git a/chrome/browser/resources/print_preview/print_preview.css b/chrome/browser/resources/print_preview/print_preview.css
index 76fc25b2899ea54e0379a1c3a93aa960386b72b9..4b94f10b7b7b41b2db7efa1b8979c2c9bea9ba1c 100644
--- a/chrome/browser/resources/print_preview/print_preview.css
+++ b/chrome/browser/resources/print_preview/print_preview.css
@@ -310,20 +310,20 @@ html[dir='rtl'] #decrement {
 }
 
 #pdf-viewer {
-  /* pluginFadeInTransitionDuration = 0.2s */
-  -webkit-transition: opacity 0.2s linear;
-  /* pluginFadeInTransitionDelay = overlayFadeOutTransitionDuration = 0.1s */
-  -webkit-transition-delay: 0.1s;
+  /* pluginFadeInTransitionDuration = 200ms */
+  -webkit-transition: opacity 200ms linear;
+  /* pluginFadeInTransitionDelay = overlayFadeOutTransitionDuration = 100ms */
+  -webkit-transition-delay: 100ms;
   height: 100%;
   opacity: 1;
   width: 100%;
 }
 
 #pdf-viewer.invisible {
-  /* pluginFadeOutTransitionDuration = 0.1s */
-  -webkit-transition: opacity 0.1s linear;
-  /* pluginFadeOutTransitionDelay = 0.25s */
-  -webkit-transition-delay: 0.25s;
+  /* pluginFadeOutTransitionDuration = 100ms */
+  -webkit-transition: opacity 100ms linear;
+  /* pluginFadeOutTransitionDelay = 250ms */
+  -webkit-transition-delay: 250ms;
   opacity: 0;
 }
 
@@ -338,10 +338,10 @@ html[dir='rtl'] #decrement {
 }
 
 #overlay-layer {
-  -webkit-transition: opacity 0.2s linear;
+  -webkit-transition: opacity 200ms linear;
   /* overlayFadeInTransitionDelay = pluginFadeOutTransitionDelay +
-   *     pluginFadeOutTransitionDuration = 0.35s */
-  -webkit-transition-delay: 0.35s;
+   *     pluginFadeOutTransitionDuration = 350ms */
+  -webkit-transition-delay: 350ms;
   -webkit-user-select: none;
   background: #cccccc;
   height: 100%;
@@ -352,8 +352,8 @@ html[dir='rtl'] #decrement {
 }
 
 #overlay-layer.invisible {
-  /* overlayFadeOutTransitionDuration = 0.1s */
-  -webkit-transition: opacity 0.1s linear;
+  /* overlayFadeOutTransitionDuration = 100ms */
+  -webkit-transition: opacity 100ms linear;
   opacity: 0;
   pointer-events: none;
 }