This adds a plugin selection policy for selecting allowed plugins

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index 62a0b88815792a08438bfff4af987eab598fa374..1307799349e1b5420ae971764513ae3e8de6bd2c 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -1367,31 +1367,34 @@ IPC_BEGIN_MESSAGES(ViewHost)
                               std::vector<WebPluginInfo> /* plugins */)
 
   // Return information about a plugin for the given URL and MIME
-  // type. If there is no matching plugin, |info| is an empty vector.
-  // If |enabled| in the WebPluginInfo struct is false, the plug-in is
-  // basically treated as if it was not installed at all.
-  // |settings| has an entry for each item in |info|.
-  // If the corresponding |settings| array element is set to
-  // CONTENT_SETTING_BLOCK, the plug-in is blocked by the content
-  // settings for |policy_url|. It still appears in navigator.plugins
-  // in Javascript though, and can be loaded via click-to-play.
-  // If the corresponding |settings| array element is set to
-  // CONTENT_SETTING_ALLOW, the domain is explicitly white-listed for
-  // the plug-in, or the user has chosen not to block nonsandboxed
-  // plugins.
-  // If the corresponding |settings| array element is set to
-  // CONTENT_SETTING_DEFAULT, the plug-in is neither blocked nor
-  // white-listed, which means that it's allowed by default and can
-  // still be blocked if it's non-sandboxed.
-  // |actual_mime_types| is a list of actual mime types supported by
-  // each plugin found that match the URL given (one for each item in |info|).
-  IPC_SYNC_MESSAGE_CONTROL3_3(ViewHostMsg_GetPluginInfoArray,
+  // type. If there is no matching plugin, |found| is false.  If
+  // |enabled| in the WebPluginInfo struct is false, the plug-in is
+  // treated as if it was not installed at all.
+  //
+  // If |setting| is set to CONTENT_SETTING_BLOCK, the plug-in is
+  // blocked by the content settings for |policy_url|. It still
+  // appears in navigator.plugins in Javascript though, and can be
+  // loaded via click-to-play.
+  //
+  // If |setting| is set to CONTENT_SETTING_ALLOW, the domain is
+  // explicitly white-listed for the plug-in, or the user has chosen
+  // not to block nonsandboxed plugins.
+  //
+  // If |setting| is set to CONTENT_SETTING_DEFAULT, the plug-in is
+  // neither blocked nor white-listed, which means that it's allowed
+  // by default and can still be blocked if it's non-sandboxed.
+  //
+  // |actual_mime_type| is the actual mime type supported by the
+  // plugin found that match the URL given (one for each item in
+  // |info|).
+  IPC_SYNC_MESSAGE_CONTROL3_4(ViewHostMsg_GetPluginInfo,
                               GURL /* url */,
                               GURL /* policy_url */,
                               std::string /* mime_type */,
-                              std::vector<WebPluginInfo> /* plugin info */,
-                              std::vector<ContentSetting> /* settings */,
-                              std::vector<std::string> /* actual_mime_types */)
+                              bool /* found */,
+                              WebPluginInfo /* plugin info */,
+                              ContentSetting /* setting */,
+                              std::string /* actual_mime_type */)
 
   // Requests spellcheck for a word.
   IPC_SYNC_MESSAGE_ROUTED2_2(ViewHostMsg_SpellCheck,
@@ -1529,10 +1532,9 @@ IPC_BEGIN_MESSAGES(ViewHost)
   // create a plugin.  The browser will create the plugin process if
   // necessary, and will return a handle to the channel on success.
   // On error an empty string is returned.
-  IPC_SYNC_MESSAGE_CONTROL3_2(ViewHostMsg_OpenChannelToPlugin,
+  IPC_SYNC_MESSAGE_CONTROL2_2(ViewHostMsg_OpenChannelToPlugin,
                               GURL /* url */,
                               std::string /* mime_type */,
-                              std::string /* locale */,
                               IPC::ChannelHandle /* handle to channel */,
                               WebPluginInfo /* info */)