Revert of Use real PlatformSupport in content unit tests

content/public/test/unittest_test_suite.h

Index: content/public/test/unittest_test_suite.h
diff --git a/content/public/test/unittest_test_suite.h b/content/public/test/unittest_test_suite.h
index 5b46ee64cfe5c85e6b9d10f3caa97d0c02fdf2fd..48ce47ed5800f056909d958b03da729c125c0003 100644
--- a/content/public/test/unittest_test_suite.h
+++ b/content/public/test/unittest_test_suite.h
@@ -13,7 +13,6 @@
 }
 
 namespace content {
-class TestWebKitPlatformSupport;
 
 // A special test suite that also initializes WebKit once for all unittests.
 // This is useful for two reasons:
@@ -32,7 +31,8 @@
   scoped_ptr<base::TestSuite> test_suite_;
 
 #if !defined(OS_IOS)
-  scoped_ptr<TestWebKitPlatformSupport> platform_support_;
+  class UnitTestWebKitPlatformSupport;
+  scoped_ptr<UnitTestWebKitPlatformSupport> webkit_platform_support_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(UnitTestTestSuite);