Move the thread hop for UMA user actions from content:: to base::.

chrome/browser/browser_process_impl_unittest.cc

Index: chrome/browser/browser_process_impl_unittest.cc
diff --git a/chrome/browser/browser_process_impl_unittest.cc b/chrome/browser/browser_process_impl_unittest.cc
index b86f2e77bb589e082ce79689f4ac0f2cbebdd6bc..f3ad6a59487f393788cdc8dc2dda740cb09878bc 100644
--- a/chrome/browser/browser_process_impl_unittest.cc
+++ b/chrome/browser/browser_process_impl_unittest.cc
@@ -7,6 +7,7 @@
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/metrics/user_metrics.h"
 #include "base/run_loop.h"
 #include "base/thread_task_runner_handle.h"
 #include "build/build_config.h"
@@ -29,6 +30,7 @@ class BrowserProcessImplTest : public ::testing::Test {
         browser_process_impl_(
             new BrowserProcessImpl(base::ThreadTaskRunnerHandle::Get().get(),
                                    command_line_)) {
+    base::SetRecordActionTaskRunner(loop_.task_runner());
     browser_process_impl_->SetApplicationLocale("en");
   }