DevTools: Introduce Landing page for Timeline panel.

third_party/WebKit/Source/devtools/front_end/timeline/module.json

Index: third_party/WebKit/Source/devtools/front_end/timeline/module.json
diff --git a/third_party/WebKit/Source/devtools/front_end/timeline/module.json b/third_party/WebKit/Source/devtools/front_end/timeline/module.json
index 4e31b049571468b403f58cde15d0899e03de3ea9..e4b9c9c41fc6477a46b121ee3ffe1fde4cb14ced 100644
--- a/third_party/WebKit/Source/devtools/front_end/timeline/module.json
+++ b/third_party/WebKit/Source/devtools/front_end/timeline/module.json
@@ -112,6 +112,38 @@
                     "shortcut": "]"
                 }
             ]
+        },
+        {
+            "type": "view",
+            "location": "timeline-landing-page",
+            "id": "Load",
+            "title": "Page Load",
+            "order": "0",
+            "className": "Timeline.LoadPerspective"
+        },
+        {
+            "type": "view",
+            "location": "timeline-landing-page",
+            "id": "Responsiveness",
+            "title": "Responsiveness",
+            "order": "1",
+            "className": "Timeline.ResponsivenessPerspective"
+        },
+        {
+            "type": "view",
+            "location": "timeline-landing-page",
+            "id": "JavaScript",
+            "title": "JavaScript",
+            "order": "2",
+            "className": "Timeline.JavaScriptPerspective"
+        },
+        {
+            "type": "view",
+            "location": "timeline-landing-page",
+            "id": "Custom",
+            "title": "Custom",
+            "order": "3",
+            "className": "Timeline.CustomPerspective"
         }
     ],
     "dependencies": [
@@ -131,6 +163,7 @@
         "TimelineFlameChart.js",
         "TimelineNetworkFlameChart.js",
         "TimelineTreeView.js",
+        "TimelineLandingPage.js",
         "TimelineUIUtils.js",
         "TimelineLayersView.js",
         "TimelinePaintProfilerView.js",
@@ -139,6 +172,7 @@
     "resources": [
         "invalidationsTree.css",
         "timelineFlamechartPopover.css",
+        "timelineLandingPage.css",
         "timelinePanel.css",
         "timelinePaintProfiler.css",
         "timelineStatusDialog.css"