DevTools: Use TextPrompt for FilterBar instead of input element

third_party/WebKit/Source/devtools/front_end/ui/textPrompt.css

Index: third_party/WebKit/Source/devtools/front_end/ui/textPrompt.css
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/textPrompt.css b/third_party/WebKit/Source/devtools/front_end/ui/textPrompt.css
index e0f93cef73624c29598a15cbafa211f5c809527a..25602a25befd16b61f4fb7358cced86007948fed 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/textPrompt.css
+++ b/third_party/WebKit/Source/devtools/front_end/ui/textPrompt.css
@@ -29,13 +29,17 @@
     white-space: pre;
 }
 
-::content .auto-complete-text,
-.text-prompt-editing ::content .auto-complete-text {
+::content .auto-complete-text {
     color: rgb(128, 128, 128) !important;
     -webkit-user-select: none;
     -webkit-user-modify: read-only;
 }
 
+::content .text-prompt:empty::before {
+    content: attr(data-placeholder);
+    color: rgb(128, 128, 128);
+}
+
 .text-prompt-editing ::content br {
     display: none;
 }