Update chrome/ to use scoped_refptr<T>::get() rather than implicit "operator T*"

chrome/browser/history/history_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // History unit tests come in two flavors:
 //
 // 1. The more complicated style is that the unit test creates a full history
 //    service. This spawns a background thread for the history backend, and
 //    all communication is asynchronous. This is useful for testing more
 //    complicated things or end-to-end behavior.
@@ skipping 127 matching lines @@
   }
 
   // testing::Test
   virtual void SetUp() {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     history_dir_ = temp_dir_.path().AppendASCII("HistoryBackendDBTest");
     ASSERT_TRUE(file_util::CreateDirectory(history_dir_));
   }
 
   void DeleteBackend() {
-    if (backend_) {
+    if (backend_.get()) {
       backend_->Closing();
       backend_ = NULL;
     }
   }
 
   virtual void TearDown() {
     DeleteBackend();
 
     // Make sure we don't have any event pending that could disrupt the next
     // test.
@@ skipping 1499 matching lines @@
   std::vector<PageUsageData*> results;
   db_->QuerySegmentUsage(segment_time, 10, &results);
   ASSERT_EQ(1u, results.size());
   EXPECT_EQ(url, results[0]->GetURL());
   EXPECT_EQ(segment_id, results[0]->GetID());
   EXPECT_EQ(title, results[0]->GetTitle());
   STLDeleteElements(&results);
 }
 
 }  // namespace history