Implement the gamepad API in the IPC proxy

ppapi/shared_impl/ppapi_permissions.cc

Index: ppapi/shared_impl/ppapi_permissions.cc
diff --git a/ppapi/shared_impl/ppapi_permissions.cc b/ppapi/shared_impl/ppapi_permissions.cc
index 987fd89977b7c088bca1f367da96901917a11e19..d92f6ba99488e9f05064598ad3d926fbb646406a 100644
--- a/ppapi/shared_impl/ppapi_permissions.cc
+++ b/ppapi/shared_impl/ppapi_permissions.cc
@@ -17,6 +17,14 @@ PpapiPermissions::PpapiPermissions(uint32 perms) : permissions_(perms) {
 PpapiPermissions::~PpapiPermissions() {
 }
 
+// static
+PpapiPermissions PpapiPermissions::AllPermissions() {
+  return PpapiPermissions(
+      PERMISSION_DEV |
+      PERMISSION_PRIVATE |
+      PERMISSION_BYPASS_USER_GESTURE);
+}
+
 bool PpapiPermissions::HasPermission(Permission perm) const {
   // Check that "perm" is a power of two to make sure the caller didn't set
   // more than one permission bit. We may want to change how permissions are