Add a minimal Security panel to DevTools (behind a hidden experiment).

Source/devtools/front_end/security/module.json

Index: Source/devtools/front_end/security/module.json
diff --git a/Source/devtools/front_end/security/module.json b/Source/devtools/front_end/security/module.json
new file mode 100644
index 0000000000000000000000000000000000000000..91f7588bf6036470a2ddf7f99cc145de7559b34d
--- /dev/null
+++ b/Source/devtools/front_end/security/module.json
@@ -0,0 +1,19 @@
+{
+    "extensions": [
+        {
+            "type": "@WebInspector.PanelFactory",
+            "name": "security",
+            "title": "Security",
+            "order": 7,
+            "className": "WebInspector.SecurityPanelFactory"
+        }
+    ],
+    "dependencies": [],

[dgozman, 2015/06/03 10:12:35]

You probably have to depend on platform, host, and sdk.

[lgarron, 2015/06/11 22:54:47]

What are each of these? The other panels don't have these in their `module.json`
files.
How do I learn how dependencies work?

[dgozman, 2015/06/12 06:20:22]

If you use something (class, function) from a file of another module, you have
to declare the dependency here.
Most of the DOM helpers are in platform module. Targets and models are in sdk.
Not sure about host, maybe you won't need it directly. Do not include unless
compiler complains.

[lgarron, 2015/06/12 19:56:01]

Makes sense. I didn't know anything about the compiler, but I'm assuming `git cl
presubmit --upload` gives the relevant output.

I found that the compiler is just as happy without "platform" and "host", but
needs "sdk". It also seems to need "ui". So, right now I have:
"dependencies": ["platform", "ui", "sdk"]

Is there something else I should be using in "ui"?

[dgozman, 2015/06/15 16:58:41]

Yep.
Dependencies are transitive (just like includes), so platform is indirectly
included in compilation through sdk/ui.
Not sure what you mean. Use what you need.

+    "experiment": "securityPanel",
+    "scripts": [
+        "SecurityPanel.js"
+    ],
+    "resources": [
+        "securityPanel.css"
+    ]
+}