Add an interface for Flash to clear its data.

content/ppapi_plugin/ppapi_thread.h

Index: content/ppapi_plugin/ppapi_thread.h
diff --git a/content/ppapi_plugin/ppapi_thread.h b/content/ppapi_plugin/ppapi_thread.h
index 0784dd3349f41009ea86e518fdc94b28ea5cd1a2..dda77c3d30b118cacbe80c4e8058b03a27bf2584 100644
--- a/content/ppapi_plugin/ppapi_thread.h
+++ b/content/ppapi_plugin/ppapi_thread.h
@@ -10,6 +10,7 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "base/scoped_native_library.h"
@@ -55,9 +56,19 @@ class PpapiThread : public ChildThread,
   void OnMsgLoadPlugin(const FilePath& path);
   void OnMsgCreateChannel(base::ProcessHandle host_process_handle,
                           int renderer_id);
+  void OnMsgClearSiteData(const FilePath& profile_path,
+                          const std::string& site,
+                          uint64 flags,
+                          uint64 max_age);
   void OnMsgSetNetworkState(bool online);
   void OnPluginDispatcherMessageReceived(const IPC::Message& msg);
 
+  // Requests that the plugin clear data, returning true on success.
+  bool ClearSiteData(const FilePath& profile_path,
+                     const std::string& site,
+                     uint64 flags,
+                     uint64 max_age);
+
   // Sets up the channel to the given renderer. On success, returns true and
   // fills the given ChannelHandle with the information from the new channel.
   bool SetupRendererChannel(base::ProcessHandle host_process_handle,