Move MetricsStateManager into the Metrics component.

chrome/browser/speech/chrome_speech_recognition_manager_delegate.cc

Index: chrome/browser/speech/chrome_speech_recognition_manager_delegate.cc
diff --git a/chrome/browser/speech/chrome_speech_recognition_manager_delegate.cc b/chrome/browser/speech/chrome_speech_recognition_manager_delegate.cc
index 8761c8faa110bb00e09a835ef9de9f24285ef757..8bd2ee2adbc38a9cfc2d9e68502c9ef80df5456e 100644
--- a/chrome/browser/speech/chrome_speech_recognition_manager_delegate.cc
+++ b/chrome/browser/speech/chrome_speech_recognition_manager_delegate.cc
@@ -81,10 +81,11 @@ class ChromeSpeechRecognitionManagerDelegate::OptionalRequestInfo
 
   void CheckUMAAndGetHardwareInfo() {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-    // prefs::kMetricsReportingEnabled is not registered for OS_CHROMEOS.
+    // metrics::prefs::kMetricsReportingEnabled is not registered for
+    // OS_CHROMEOS.
 #if !defined(OS_CHROMEOS)
     if (g_browser_process->local_state()->GetBoolean(
-        prefs::kMetricsReportingEnabled)) {
+        metrics::prefs::kMetricsReportingEnabled)) {
       // Access potentially slow OS calls from the FILE thread.
       BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
           base::Bind(&OptionalRequestInfo::GetHardwareInfo, this));