Const-ify RefCountedThreadSafe::AddRef and Release.

chrome/test/testing_profile.cc

Index: chrome/test/testing_profile.cc
diff --git a/chrome/test/testing_profile.cc b/chrome/test/testing_profile.cc
index 4de614332a5c5824e94f5659bfc81b5f3fe95c26..829fcc96af9151394c17eaa1abb903f1ca2121c7 100644
--- a/chrome/test/testing_profile.cc
+++ b/chrome/test/testing_profile.cc
@@ -122,7 +122,7 @@ class TestURLRequestContextGetter : public URLRequestContextGetter {
       context_ = new TestURLRequestContext();
     return context_.get();
   }
-  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() {
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() const {
     return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
   }
 
@@ -147,7 +147,7 @@ class TestExtensionURLRequestContextGetter : public URLRequestContextGetter {
       context_ = new TestExtensionURLRequestContext();
     return context_.get();
   }
-  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() {
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() const {
     return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
   }