DevTools: bring back old landing page in timeline/performance.

third_party/WebKit/Source/devtools/front_end/timeline/timelinePanel.css

Index: third_party/WebKit/Source/devtools/front_end/timeline/timelinePanel.css
diff --git a/third_party/WebKit/Source/devtools/front_end/timeline/timelinePanel.css b/third_party/WebKit/Source/devtools/front_end/timeline/timelinePanel.css
index 4f5292a04e19f0e2ce582d980febedb0230a5f2f..f490b71f3191f77002b8647e7a87979d9f96fb7c 100644
--- a/third_party/WebKit/Source/devtools/front_end/timeline/timelinePanel.css
+++ b/third_party/WebKit/Source/devtools/front_end/timeline/timelinePanel.css
@@ -31,6 +31,11 @@
     border-bottom: 1px solid #dadada;
 }
 
+.timeline-settings-pane {
+    flex: none;
+    border-bottom: 1px solid #dadada;
+}
+
 #timeline-overview-panel {
     flex: none;
     position: relative;
@@ -77,7 +82,6 @@
 
 .timeline.panel .status-pane-container {
     z-index: 1000;
-    pointer-events: none;
     display: flex;
     align-items: center;
 }
@@ -637,3 +641,21 @@
     color: #5a5a5a;
     white-space: nowrap;
 }
+
+.timeline-landing-page {
+    position: absolute;
+    background-color: white;
+    justify-content: center;
+    align-items: center;
+    overflow: auto;
+    font-size: 13px;
+    color: #777;
+}
+
+.timeline-landing-page > div {
+    width: 430px;
+}
+
+.timeline-landing-page > div > p {
+    flex: none;
+}