[HBD] Remove PluginCache and reload plugin list when origin changes

third_party/WebKit/Source/platform/plugins/PluginData.h

 /*
     Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #ifndef PluginData_h
 #define PluginData_h
 
 #include "platform/PlatformExport.h"
+#include "public/platform/WebSecurityOrigin.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-class Page;
 struct PluginInfo;
 
 struct MimeClassInfo {
     String type;
     String desc;
     Vector<String> extensions;
 };
 
 inline bool operator==(const MimeClassInfo& a, const MimeClassInfo& b)
 {
     return a.type == b.type && a.desc == b.desc && a.extensions == b.extensions;
 }
 
 struct PluginInfo {
     String name;
     String file;
     String desc;
     Vector<MimeClassInfo> mimes;
 };
 
 class PLATFORM_EXPORT PluginData : public RefCounted<PluginData> {
     WTF_MAKE_NONCOPYABLE(PluginData);
 public:
-    static PassRefPtr<PluginData> create(const Page* page) { return adoptRef(new PluginData(page)); }
+    static PassRefPtr<PluginData> create(const WebSecurityOrigin& origin) { return adoptRef(new PluginData(origin)); }
 
     const Vector<PluginInfo>& plugins() const { return m_plugins; }
     const Vector<MimeClassInfo>& mimes() const { return m_mimes; }
     const Vector<size_t>& mimePluginIndices() const { return m_mimePluginIndices; }
 
     bool supportsMimeType(const String& mimeType) const;
     String pluginNameForMimeType(const String& mimeType) const;
+    void checkOriginChange(const WebSecurityOrigin&);
 
     static void refresh();
+    static bool m_refresh;
 
 private:
-    explicit PluginData(const Page*);
-    void initPlugins(const Page*);
+    explicit PluginData(const WebSecurityOrigin&);
+    void initPlugins(const WebSecurityOrigin&);
     const PluginInfo* pluginInfoForMimeType(const String& mimeType) const;
 
     Vector<PluginInfo> m_plugins;
     Vector<MimeClassInfo> m_mimes;
     Vector<size_t> m_mimePluginIndices;
+    WebSecurityOrigin m_origin;

[tommycli, 2016/07/29 23:38:19]

my suggestion: Don't save m_origin here. Save it on Page. Just discard the
cached m_pluginData within Page when the origin changes. 

[trizzofo, 2016/08/01 23:36:14]

Done.

 };
 
 // Checks if any of the plugins handle this extension, and if so returns the
 // plugin's mime type for this extension. Otherwise returns an empty string.
 PLATFORM_EXPORT String getPluginMimeTypeFromExtension(const String& extension);
 
 } // namespace blink
 
 #endif