Move ReadFileToString to the base namespace.

content/common/gpu/client/gl_helper_benchmark.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.
 
 // This file looks like a unit test, but it contains benchmarks and test
 // utilities intended for manual evaluation of the scalers in
 // gl_helper*. These tests produce output in the form of files and printouts,
 // but cannot really "fail". There is no point in making these tests part
 // of any test automation run.
 
@@ skipping 64 matching lines @@
   virtual void TearDown() {
     helper_scaling_.reset(NULL);
     helper_.reset(NULL);
     context_.reset(NULL);
   }
 
 
   void LoadPngFileToSkBitmap(const base::FilePath& filename,
                              SkBitmap* bitmap) {
     std::string compressed;
-    file_util::ReadFileToString(base::MakeAbsoluteFilePath(filename),
-                                &compressed);
+    base::ReadFileToString(base::MakeAbsoluteFilePath(filename), &compressed);
     ASSERT_TRUE(compressed.size());
     ASSERT_TRUE(gfx::PNGCodec::Decode(
         reinterpret_cast<const unsigned char*>(compressed.data()),
         compressed.size(), bitmap));
   }
 
   // Save the image to a png file. Used to create the initial test files.
   void SaveToFile(SkBitmap* bitmap, const base::FilePath& filename) {
     std::vector<unsigned char> compressed;
     ASSERT_TRUE(gfx::PNGCodec::Encode(
@@ skipping 216 matching lines @@
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool pool;
 #endif
 #if defined(TOOLKIT_GTK)
   gfx::GtkInitFromCommandLine(*CommandLine::ForCurrentProcess());
 #endif
   gfx::GLSurface::InitializeOneOff();
 
   return content::UnitTestTestSuite(suite).Run();
 }