Mac Sandbox: Clean up forward declaration of internal sandbox functions.

chrome/common/sandbox_mac_fontloading_unittest.mm

Index: chrome/common/sandbox_mac_fontloading_unittest.mm
diff --git a/chrome/common/sandbox_mac_fontloading_unittest.mm b/chrome/common/sandbox_mac_fontloading_unittest.mm
index 432af63cc2ad3dd6d2c02fbbc28bdee6fe2ebf6a..1fa76cd348ff068c457201a3a0a91e040298fd12 100644
--- a/chrome/common/sandbox_mac_fontloading_unittest.mm
+++ b/chrome/common/sandbox_mac_fontloading_unittest.mm
@@ -16,6 +16,7 @@
 namespace {
 
 using sandboxtest::MacSandboxTest;
+using sandbox::Sandbox;
 
 bool CGFontFromFontContainer(ATSFontContainerRef container, CGFontRef* out) {
   // Count the number of fonts that were loaded.
@@ -169,7 +170,7 @@ TEST_F(MacSandboxTest, FontLoadingTest) {
   file_util::WriteFileDescriptor(fileno(temp_file),
       static_cast<const char *>(font_data.memory()), font_data_size);
 
-  ASSERT_TRUE(RunTestInSandbox(sandbox::SANDBOX_TYPE_RENDERER,
+  ASSERT_TRUE(RunTestInSandbox(Sandbox::SANDBOX_TYPE_RENDERER,
                   "FontLoadingTestCase", temp_file_path.value().c_str()));
   temp_file_closer.reset();
   ASSERT_TRUE(file_util::Delete(temp_file_path, false));