[DevTools] UI for blocked URLs.

Source/devtools/front_end/ui/inspectorCommon.css

Index: Source/devtools/front_end/ui/inspectorCommon.css
diff --git a/Source/devtools/front_end/ui/inspectorCommon.css b/Source/devtools/front_end/ui/inspectorCommon.css
index c69ae0edaa4459edb8d3e6a2b8776ba2b2b92283..0a91bda3059af3b21f0835ffe7729cc20ede0072 100644
--- a/Source/devtools/front_end/ui/inspectorCommon.css
+++ b/Source/devtools/front_end/ui/inspectorCommon.css
@@ -93,6 +93,10 @@ iframe.fill {
     flex: auto;
 }
 
+.flex-auto-important {
+    flex: auto !important;
+}
+
 .flex-none {
     flex: none;
 }
@@ -158,3 +162,25 @@ input[type="text"]:focus {
 .dimmed {
     opacity: 0.6;
 }
+
+.editing {
+    -webkit-user-select: text;
+    box-shadow: rgba(0, 0, 0, .5) 3px 3px 4px;
+    outline: 1px solid rgb(66%, 66%, 66%) !important;
+    background-color: white;
+    -webkit-user-modify: read-write-plaintext-only;
+    text-overflow: clip !important;
+    padding-left: 2px;
+    margin-left: -2px;
+    padding-right: 2px;
+    margin-right: -2px;
+    margin-bottom: -1px;
+    padding-bottom: 1px;
+    opacity: 1.0 !important;
+}
+
+.editing,
+.editing * {
+    color: #222 !important;
+    text-decoration: none !important;
+}