downloads: add "No downloads" and "No search results" messages.

chrome/browser/resources/downloads/downloads.css

Index: chrome/browser/resources/downloads/downloads.css
diff --git a/chrome/browser/resources/downloads/downloads.css b/chrome/browser/resources/downloads/downloads.css
index c93ae3bcf13ac4207e066a6b9e827f8d68d9e881..2a3303f7c539704636ff708eac4fe56ee035f310 100644
--- a/chrome/browser/resources/downloads/downloads.css
+++ b/chrome/browser/resources/downloads/downloads.css
@@ -26,19 +26,24 @@
   -webkit-margin-end: 16px;
 }
 
-#downloads-display {
+#downloads-display,
+#no-downloads-or-results {
   max-width: 740px;
   padding: 0 10px 34px;
 }
 
 .download {
   -webkit-margin-start: 114px;
-  -webkit-padding-start: 56px;
+  -webkit-padding-start: 52px;
   margin-bottom: 15px;
-  margin-top: 6px;
   position: relative;
 }
 
+.download,
+#no-downloads-or-results {
+  margin-top: 6px;
+}
+
 .date-container {
   left: -110px;
   position: absolute;
@@ -111,6 +116,13 @@ html[dir=rtl] .progress {
   background-size: 48px;
 }
 
+.name,
+.src-url,
+.controls a {
+  -webkit-padding-end: 4px;
+  -webkit-padding-start: 4px;
+}
+
 .name {
   -webkit-padding-end: 16px;
   display: none;
@@ -140,7 +152,7 @@ html[dir=rtl] .progress {
 }
 
 .controls a {
-  -webkit-margin-end: 16px;
+  -webkit-margin-end: 12px;
   color: #777;
 }