Revert of Make the extension's sidebar pane auto-resizable.

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

Index: third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
diff --git a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
index 1ec2ecda2d96a6d81d7e425a91c045f8c5457e24..9d8161edae6245d7cc2bfd932a580428936a5091 100644
--- a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
+++ b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
@@ -68,6 +68,7 @@
     this._registerHandler(commands.Reload, this._onReload.bind(this));
     this._registerHandler(commands.SetOpenResourceHandler, this._onSetOpenResourceHandler.bind(this));
     this._registerHandler(commands.SetResourceContent, this._onSetResourceContent.bind(this));
+    this._registerHandler(commands.SetSidebarHeight, this._onSetSidebarHeight.bind(this));
     this._registerHandler(commands.SetSidebarContent, this._onSetSidebarContent.bind(this));
     this._registerHandler(commands.SetSidebarPage, this._onSetSidebarPage.bind(this));
     this._registerHandler(commands.ShowPanel, this._onShowPanel.bind(this));
@@ -332,6 +333,15 @@
     sidebarPanes: function()
     {
         return this._sidebarPanes;
+    },
+
+    _onSetSidebarHeight: function(message)
+    {
+        var sidebar = this._clientObjects[message.id];
+        if (!sidebar)
+            return this._status.E_NOTFOUND(message.id);
+        sidebar.setHeight(message.height);
+        return this._status.OK();
     },
 
     _onSetSidebarContent: function(message, port)