Move MatchPattern to its own header and the base namespace.

content/browser/tracing/background_tracing_manager_browsertest.cc

 // Copyright 2015 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/bind.h"
+#include "base/strings/pattern.h"
 #include "base/trace_event/trace_event.h"
 #include "content/public/browser/background_tracing_manager.h"
 #include "content/public/browser/background_tracing_preemptive_config.h"
 #include "content/public/browser/background_tracing_reactive_config.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "third_party/zlib/zlib.h"
 
 namespace content {
@@ skipping 180 matching lines @@
     run_loop.Run();
 
     EXPECT_TRUE(upload_config_wrapper.get_receive_count() == 1);
   }
 }
 
 namespace {
 
 bool IsTraceEventArgsWhitelisted(const char* category_group_name,
                                  const char* event_name) {
-  if (MatchPattern(category_group_name, "benchmark") &&
-      MatchPattern(event_name, "whitelisted")) {
+  if (base::MatchPattern(category_group_name, "benchmark") &&
+      base::MatchPattern(event_name, "whitelisted")) {
     return true;
   }
 
   return false;
 }
 
 }  // namespace
 
 // This tests that non-whitelisted args get stripped if required.
 IN_PROC_BROWSER_TEST_F(BackgroundTracingManagerBrowserTest,
@@ skipping 362 matching lines @@
     BackgroundTracingManager::GetInstance()->TriggerNamedEvent(
         handle, base::Bind(&StartedFinalizingCallback, base::Closure(), false));
 
     run_loop.Run();
 
     EXPECT_TRUE(upload_config_wrapper.get_receive_count() == 1);
   }
 }
 
 }  // namespace content