Remove threading from WifiDataProviderCommon.

content/browser/geolocation/network_location_provider_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.
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 58 matching lines @@
         stop_calls_(0),
         got_data_(true) {
   }
 
   virtual ~MockDeviceDataProviderImpl() {
     CHECK(this == instance_);
     instance_ = NULL;
   }
 
   // DeviceDataProviderImplBase implementation.
-  virtual bool StartDataProvider() {
+  virtual void StartDataProvider() {
     ++start_calls_;
-    return true;
   }
   virtual void StopDataProvider() {
     ++stop_calls_;
   }
   virtual bool GetData(DataType* data_out) {
     CHECK(data_out);
     *data_out = data_;
     return got_data_;
   }
 
@@ skipping 468 matching lines @@
       EXPECT_TRUE(cache.FindPosition(CreateReferenceWifiScanData(1)));
     } else {
       const int evicted = i - kCacheSize;
       EXPECT_FALSE(cache.FindPosition(CreateReferenceWifiScanData(evicted)));
       EXPECT_TRUE(cache.FindPosition(CreateReferenceWifiScanData(evicted + 1)));
     }
   }
 }
 
 }  // namespace content