Fix Mandoline apptests on Windows.

ui/gl/gl_implementation_win.cc

 // Copyright (c) 2012 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 <vector>
 
 #include "base/at_exit.h"
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 72 matching lines @@
 
   // Allow the main thread or another to initialize these bindings
   // after instituting restrictions on I/O. Going forward they will
   // likely be used in the browser process on most platforms. The
   // one-time initialization cost is small, between 2 and 5 ms.
   base::ThreadRestrictions::ScopedAllowIO allow_io;
 
   switch (implementation) {
     case kGLImplementationOSMesaGL: {
       base::FilePath module_path;
-      if (!PathService::Get(base::DIR_MODULE, &module_path)) {
-        LOG(ERROR) << "PathService::Get failed.";
-        return false;
-      }
-
+      PathService::Get(base::DIR_MODULE, &module_path);
       base::NativeLibrary library = base::LoadNativeLibrary(
           module_path.Append(L"osmesa.dll"), NULL);
       if (!library) {
-        DVLOG(1) << "osmesa.dll not found";
-        return false;
+        PathService::Get(base::DIR_EXE, &module_path);
+        library = base::LoadNativeLibrary(
+            module_path.Append(L"osmesa.dll"), NULL);
+        if (!library) {
+          DVLOG(1) << "osmesa.dll not found";
+          return false;
+        }
       }
 
       GLGetProcAddressProc get_proc_address =
           reinterpret_cast<GLGetProcAddressProc>(
               base::GetFunctionPointerFromNativeLibrary(
                   library, "OSMesaGetProcAddress"));
       if (!get_proc_address) {
         DLOG(ERROR) << "OSMesaGetProcAddress not found.";
         base::UnloadNativeLibrary(library);
         return false;
@@ skipping 231 matching lines @@
     case kGLImplementationDesktopGL:
       return GetGLWindowSystemBindingInfoWGL(info);
     case kGLImplementationEGLGLES2:
       return GetGLWindowSystemBindingInfoEGL(info);
     default:
       return false;
   }
 }
 
 }  // namespace gfx