Clean up Automation and Chrome Frame IPC code.

chrome/test/automation/automation_proxy.h

Index: chrome/test/automation/automation_proxy.h
===================================================================
--- chrome/test/automation/automation_proxy.h	(revision 69966)
+++ chrome/test/automation/automation_proxy.h	(working copy)
@@ -31,10 +31,7 @@
 class ExtensionProxy;
 class TabProxy;
 class WindowProxy;
-
-namespace IPC {
 struct ExternalTabSettings;
-}
 
 // This is an interface that AutomationProxy-related objects can use to
 // access the message-sending abilities of the Proxy.
@@ -228,7 +225,7 @@
   // returns a TabProxy representing the tab as well as a window handle
   // that can be reparented in another process.
   scoped_refptr<TabProxy> CreateExternalTab(
-      const IPC::ExternalTabSettings& settings,
+      const ExternalTabSettings& settings,
       gfx::NativeWindow* external_tab_container,
       gfx::NativeWindow* tab);