Instant: Use only one hidden WebContents per profile.

chrome/browser/resources/instant/instant.css

Index: chrome/browser/resources/instant/instant.css
diff --git a/chrome/browser/resources/instant/instant.css b/chrome/browser/resources/instant/instant.css
index 4e47245295ab6d5920b1b849d50ac3c36703beab..a7dc4c1431f27a9fea3cf995d03fb2914c7472cc 100644
--- a/chrome/browser/resources/instant/instant.css
+++ b/chrome/browser/resources/instant/instant.css
@@ -4,46 +4,7 @@
  * found in the LICENSE file.
  */
 
-body {
-  font-family: Arial, sans-serif;
-  font-size: 12px;
-  margin: 10px;
-  min-width: 47em;
-  padding-bottom: 65px;
-}
-
-img {
-  float: left;
-  height: 16px;
+.time {
+  color: teal;
   padding-right: 5px;
-  width: 16px;
-}
-
-.section {
-  background-color: rgb(235, 239, 249);
-  border-top: 1px solid rgb(181, 199, 222);
-  font-weight: bold;
-  margin: 10px 0 0;
-  padding: 2px 2px;
-}
-
-.row {
-  border-bottom: 1px solid #a0a0a0;
-  padding: 5px;
-}
-
-.url {
-  color: #a0a0a0;
-}
-
-.debug {
-  margin: 1px;
-}
-
-.debug span+span {
-  padding-left: 5px;
-}
-
-.timestamp {
-  color: blue;
 }