Add TestingInstance::EvalScript method which posts a message that the test page can eval().

ppapi/native_client/src/shared/ppapi_proxy/ppb_testing.srpc

 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # RPC methods used to implement PPB_Testing calls from the plugin.
 # See ppapi/c/dev/ppb_testing_dev.h for interface details.
 {
  'name': 'PpbTestingRpc',
  'rpcs': [
           {'name': 'PPB_Testing_ReadImageData',
@@ skipping 15 matching lines @@
                      ],
            'outputs': [
                       ]
           },
           {'name': 'PPB_Testing_GetLiveObjectsForInstance',
            'inputs': [['instance', 'PP_Instance'],
                      ],
            'outputs': [['live_object_count', 'int32_t'],  # uint32_t
                       ]
           },
+          {'name': 'PPB_Testing_SimulateInputEvent',
+           'inputs': [['instance', 'PP_Instance'],
+                      ['input_event', 'PP_Resource'],
+                     ],
+           'outputs': [
+                      ]
+          },
+          {'name': 'PPB_Testing_ExecuteScript',
+           'inputs': [['instance', 'PP_Instance'],
+                      ['script', 'char[]'],               # PP_Var
+                     ],
+           'outputs': [['result', 'char[]'],              # PP_Var
+                       ['exception', 'char[]'],           # PP_Var
+                      ]
+          }
          ]
 }