Clean up some nits in base::NativeLibrary.

base/native_library_win.cc

Index: base/native_library_win.cc
diff --git a/base/native_library_win.cc b/base/native_library_win.cc
index 1ca3e92f54768b5608faabdb9489631c2cc5cf08..faf0bdba4be5fa3bbc74d4b960f6ea0adee4e7a9 100644
--- a/base/native_library_win.cc
+++ b/base/native_library_win.cc
@@ -62,8 +62,7 @@ NativeLibrary LoadNativeLibrary(const FilePath& library_path,
 NativeLibrary LoadNativeLibraryDynamically(const FilePath& library_path) {
   typedef HMODULE (WINAPI* LoadLibraryFunction)(const wchar_t* file_name);
 
-  LoadLibraryFunction load_library;
-  load_library = reinterpret_cast<LoadLibraryFunction>(
+  LoadLibraryFunction load_library = reinterpret_cast<LoadLibraryFunction>(
       GetProcAddress(GetModuleHandle(L"kernel32.dll"), "LoadLibraryW"));
 
   return LoadNativeLibraryHelper(library_path, load_library, NULL);
@@ -76,13 +75,13 @@ void UnloadNativeLibrary(NativeLibrary library) {
 
 // static
 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
-                                          const char* name) {
-  return GetProcAddress(library, name);
+                                          StringPiece name) {
+  return GetProcAddress(library, name.data());
 }
 
 // static
-string16 GetNativeLibraryName(const string16& name) {
-  return name + ASCIIToUTF16(".dll");
+string16 GetNativeLibraryName(StringPiece16 name) {
+  return name.as_string() + ASCIIToUTF16(".dll");
 }
 
 }  // namespace base