Print Preview: Always enable the internal PDF plugin for print preview.

content/browser/plugin_service.h

Index: content/browser/plugin_service.h
===================================================================
--- content/browser/plugin_service.h	(revision 96803)
+++ content/browser/plugin_service.h	(working copy)
@@ -10,6 +10,7 @@
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
@@ -100,7 +101,8 @@
                      webkit::WebPluginInfo* info,
                      std::string* actual_mime_type);
 
-  // Safe to be called from any thread.
+  // Safe to be called from any thread. If |plugin| has an empty |url| field,

[jam, 2011/08/16 00:45:54]

nit: this comment belongs above OverriddenPlugin::url. Also, to be precise it
should say "render view" instead of "tab", since if the user navigates in that
tab to a pdf, we'll still use reader.

+  // then the override applies to all urls in that tab.
   void OverridePluginForTab(const OverriddenPlugin& plugin);
 
   // Restricts the given plugin to the the scheme and host of the given url.