Cleanup: Correctly spell success(ful).

ppapi/proxy/video_encoder_resource_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/synchronization/waitable_event.h"
 #include "ppapi/c/pp_codecs.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_video_encoder.h"
@@ skipping 625 matching lines @@
     ResourceMessageCallParams error_params(encoder.get(), 0);
     SendNotifyError(error_params, PP_ERROR_FAILED);
     ASSERT_TRUE(cb.called());
     ASSERT_EQ(PP_ERROR_FAILED, cb.result());
   }
 }
 
 TEST_F(VideoEncoderResourceTest, InitializeSuccess) {
   {
     // Verify the initialize callback is called when initialization is
-    // successfull.
+    // successful.
     LockingResourceReleaser encoder(CreateEncoder());
     ResourceMessageCallParams params;
     PP_Size size = kFrameSize;
     const uint32_t kBitrate = 420000;
     MockCompletionCallback cb;
     int32_t result = encoder_iface()->Initialize(
         encoder.get(), PP_VIDEOFRAME_FORMAT_I420, &size,
         PP_VIDEOPROFILE_H264MAIN, kBitrate,
         PP_HARDWAREACCELERATION_WITHFALLBACK,
         PP_MakeOptionalCompletionCallback(&MockCompletionCallback::Callback,
@@ skipping 485 matching lines @@
     ResourceMessageCallParams params;
     uint32_t frame_id;
     bool force_frame;
     ASSERT_TRUE(CheckEncodeMsg(&params, &frame_id, &force_frame));
     SendEncodeReply(params, frame_id);
   }
 }
 
 }  // namespace proxy
 }  // namespace ppapi