Remove some unneeded uses of wstring.

content/browser/renderer_host/media/video_capture_host_unittest.cc

 // Copyright (c) 2011 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 <map>
 #include <string>
 
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 30 matching lines @@
 
 // Define to use a real video capture device.
 // #define TEST_REAL_CAPTURE_DEVICE
 
 // Simple class used for dumping video to a file. This can be used for
 // verifying the output.
 class DumpVideo {
  public:
   DumpVideo() : expected_size_(0) {}
   void StartDump(int width, int height) {
-    // Create an FilePath that works on all platforms. There should
-    // be a better way.
-    FilePath file_name =
-        FilePath::FromWStringHack(StringPrintf(L"dump_w%d_h%d.yuv", width,
-                                               height));
+    FilePath file_name = FilePath(
+        StringPrintf(FILE_PATH_LITERAL("dump_w%d_h%d.yuv"), width, height));
     file_.reset(file_util::OpenFile(file_name, "wb"));
     expected_size_ = width * height * 3 / 2;
   }
   void NewVideoFrame(const void* buffer) {
     if (file_.get() != NULL) {
       fwrite(buffer, expected_size_, 1, file_.get());
     }
   }
 
  private:
@@ skipping 310 matching lines @@
 }
 
 #ifdef DUMP_VIDEO
 TEST_F(VideoCaptureHostTest, CaptureAndDumpVideoVga) {
   CaptureAndDumpVideo(640, 480, 30);
 }
 TEST_F(VideoCaptureHostTest, CaptureAndDump720P) {
   CaptureAndDumpVideo(1280, 720, 30);
 }
 #endif