Fix "unreachable code" warnings (MSVC warning 4702) in base/.

base/win/event_trace_consumer_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.
 //
 // Unit tests for event trace consumer base class.
 #include "base/win/event_trace_consumer.h"
 
 #include <list>
 
 #include <objbase.h>
@@ skipping 137 matching lines @@
   }
 
   HRESULT StartConsumerThread() {
     consumer_ready_.Set(::CreateEvent(NULL, TRUE, FALSE, NULL));
     EXPECT_TRUE(consumer_ready_ != NULL);
     consumer_thread_.Set(::CreateThread(NULL, 0, ConsumerThreadMainProc, this,
                                         0, NULL));
     if (consumer_thread_.Get() == NULL)
       return HRESULT_FROM_WIN32(::GetLastError());
 
-    HRESULT hr = S_OK;
     HANDLE events[] = { consumer_ready_, consumer_thread_ };
     DWORD result = ::WaitForMultipleObjects(arraysize(events), events,
                                             FALSE, INFINITE);
     switch (result) {
       case WAIT_OBJECT_0:
         // The event was set, the consumer_ is ready.
         return S_OK;
       case WAIT_OBJECT_0 + 1: {
           // The thread finished. This may race with the event, so check
           // explicitly for the event here, before concluding there's trouble.
           if (::WaitForSingleObject(consumer_ready_, 0) == WAIT_OBJECT_0)
             return S_OK;
           DWORD exit_code = 0;
           if (::GetExitCodeThread(consumer_thread_, &exit_code))
             return exit_code;
           return HRESULT_FROM_WIN32(::GetLastError());
-          break;
         }
       default:
         return E_UNEXPECTED;
-        break;
     }
-
-    return hr;
   }
 
   // Waits for consumer_ thread to exit, and returns its exit code.
   HRESULT JoinConsumerThread() {
     if (::WaitForSingleObject(consumer_thread_, INFINITE) != WAIT_OBJECT_0)
       return HRESULT_FROM_WIN32(::GetLastError());
 
     DWORD exit_code = 0;
     if (::GetExitCodeThread(consumer_thread_, &exit_code))
       return exit_code;
@@ skipping 37 matching lines @@
 }  // namespace
 
 TEST_F(EtwTraceConsumerRealtimeTest, ConsumeEvent) {
   EtwTraceController controller;
   if (controller.StartRealtimeSession(session_name_.c_str(), 100 * 1024) ==
       E_ACCESSDENIED) {
     VLOG(1) << "You must be an administrator to run this test on Vista";
     return;
   }
 
-  ASSERT_HRESULT_SUCCEEDED(controller.EnableProvider(test_provider_,
-      TRACE_LEVEL_VERBOSE, 0xFFFFFFFF));
+  ASSERT_HRESULT_SUCCEEDED(controller.EnableProvider(
+      test_provider_, TRACE_LEVEL_VERBOSE, 0xFFFFFFFF));
 
   EtwTraceProvider provider(test_provider_);
   ASSERT_EQ(ERROR_SUCCESS, provider.Register());
 
   // Start the consumer_.
   ASSERT_HRESULT_SUCCEEDED(StartConsumerThread());
   ASSERT_EQ(0, TestConsumer::events_.size());
 
   EtwMofEvent<1> event(kTestEventType, 1, TRACE_LEVEL_ERROR);
   EXPECT_EQ(ERROR_SUCCESS, provider.Log(&event.header));
@@ skipping 109 matching lines @@
     return;
   }
   ASSERT_HRESULT_SUCCEEDED(hr) << "RoundTripEvent failed";
   ASSERT_TRUE(trace != NULL);
   ASSERT_EQ(sizeof(kData), trace->MofLength);
   ASSERT_STREQ(kData, reinterpret_cast<const char*>(trace->MofData));
 }
 
 }  // namespace win
 }  // namespace base