Implement PluginsPermissionContext and hookup to flash download interception.

chrome/browser/plugins/plugins_permission_context.h

Index: chrome/browser/plugins/plugins_permission_context.h
diff --git a/chrome/browser/plugins/plugins_permission_context.h b/chrome/browser/plugins/plugins_permission_context.h
index 5530a8a5fafcdbadcb607322a17774bdcf352071..d9e4b63b747d5dab3657f950ccd0519c0897e1a5 100644
--- a/chrome/browser/plugins/plugins_permission_context.h
+++ b/chrome/browser/plugins/plugins_permission_context.h
@@ -8,6 +8,9 @@
 #include "base/macros.h"
 #include "chrome/browser/permissions/permission_context_base.h"
 
+class GURL;
+class PermissionRequestID;
+
 class PluginsPermissionContext : public PermissionContextBase {
  public:
   explicit PluginsPermissionContext(Profile* profile);
@@ -15,6 +18,12 @@ class PluginsPermissionContext : public PermissionContextBase {
 
  private:
   // PermissionContextBase:
+  ContentSetting GetPermissionStatus(
+      const GURL& requesting_origin,
+      const GURL& embedding_origin) const override;
+  void UpdateTabContext(const PermissionRequestID& id,
+                        const GURL& requesting_origin,
+                        bool allowed) override;
   bool IsRestrictedToSecureOrigins() const override;
 
   DISALLOW_COPY_AND_ASSIGN(PluginsPermissionContext);