Make the extension's sidebar pane auto-resizable.

third_party/WebKit/Source/devtools/front_end/extensions/ExtensionAPI.js

Index: third_party/WebKit/Source/devtools/front_end/extensions/ExtensionAPI.js
diff --git a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionAPI.js b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionAPI.js
index 850fb24d9c3f1737340aa37303ce23587c604a98..d1b670ad526f577e9b2a117011bb96238dba9633 100644
--- a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionAPI.js
+++ b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionAPI.js
@@ -81,7 +81,6 @@ function defineCommonExtensionSymbols(apiPrivate)
         SetOpenResourceHandler: "setOpenResourceHandler",
         SetResourceContent: "setResourceContent",
         SetSidebarContent: "setSidebarContent",
-        SetSidebarHeight: "setSidebarHeight",
         SetSidebarPage: "setSidebarPage",
         ShowPanel: "showPanel",
         StopAuditCategoryRun: "stopAuditCategoryRun",
@@ -388,6 +387,20 @@ function defineDeprecatedProperty(object, className, oldName, newName)
     object.__defineGetter__(oldName, getter);
 }
 
+function defineDeprecatedMethod(object, className, oldName)
+{
+    var warningGiven = false;
+    function noop()
+    {
+        if (!warningGiven) {

[caseq, 2016/04/20 18:17:12]

nit:
if (warningGiven)
    return;

(we prefer early bail-out)

+            console.warn(className + "." + oldName + " is deprecated, please don't use it. It is a no-op.");
+            warningGiven = true;
+        }
+        return null;

[caseq, 2016/04/20 18:17:12]

drop return altogether?

+    }
+    object.oldName = noop.bind(null);

[caseq, 2016/04/20 18:17:12]

Hmm... Does this work?

+}
+
 function extractCallbackArgument(args)
 {
     var lastArgument = args[args.length - 1];
@@ -481,14 +494,10 @@ ExtensionPanelImpl.prototype = {
 function ExtensionSidebarPaneImpl(id)
 {
     ExtensionViewImpl.call(this, id);
+    defineDeprecatedMethod(this, "ExtensionSidebarPane", "setHeight");
 }
 
 ExtensionSidebarPaneImpl.prototype = {
-    setHeight: function(height)
-    {
-        extensionServer.sendRequest({ command: commands.SetSidebarHeight, id: this._id, height: height });
-    },
-
     setExpression: function(expression, rootTitle, evaluateOptions)
     {
         var request = {