Supports building gtest as a DLL (by Vlad Losev).

include/gtest/gtest-test-part.h

@@ -44,7 +44,7 @@ namespace testing {
 // assertion or an explicit FAIL(), ADD_FAILURE(), or SUCCESS()).
 //
 // Don't inherit from TestPartResult as its destructor is not virtual.
-class TestPartResult {
+class GTEST_API_ TestPartResult {
  public:
   // The possible outcomes of a test part (i.e. an assertion or an
   // explicit SUCCEED(), FAIL(), or ADD_FAILURE()).
@@ -120,7 +120,7 @@ std::ostream& operator<<(std::ostream& os, const TestPartResult& result);
 //
 // Don't inherit from TestPartResultArray as its destructor is not
 // virtual.
-class TestPartResultArray {
+class GTEST_API_ TestPartResultArray {
  public:
   TestPartResultArray() {}
 
@@ -155,7 +155,8 @@ namespace internal {
 // reported, it only delegates the reporting to the former result reporter.
 // The original result reporter is restored in the destructor.
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-class HasNewFatalFailureHelper : public TestPartResultReporterInterface {
+class GTEST_API_ HasNewFatalFailureHelper
+    : public TestPartResultReporterInterface {
  public:
   HasNewFatalFailureHelper();
   virtual ~HasNewFatalFailureHelper();