Split UserMetrics into API vs. implementation. Move API to content/public.

chrome/browser/extensions/extension_function.cc

Index: chrome/browser/extensions/extension_function.cc
diff --git a/chrome/browser/extensions/extension_function.cc b/chrome/browser/extensions/extension_function.cc
index 2e2d702cdb8f63a53f43160a1d2c63b9ac119b0e..1854de5d2f41926724506ccd240c09c59f0dada7 100644
--- a/chrome/browser/extensions/extension_function.cc
+++ b/chrome/browser/extensions/extension_function.cc
@@ -12,13 +12,14 @@
 #include "chrome/browser/renderer_host/chrome_render_message_filter.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "content/browser/renderer_host/render_view_host.h"
-#include "content/browser/user_metrics.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
+#include "content/public/browser/user_metrics.h"
 #include "content/public/common/result_codes.h"
 
 using content::BrowserThread;
+using content::UserMetricsAction;
 
 // static
 void ExtensionFunctionDeleteTraits::Destruct(const ExtensionFunction* x) {
@@ -135,7 +136,7 @@ void ExtensionFunction::HandleBadMessage(base::ProcessHandle process) {
     CHECK(false);
   } else {
     NOTREACHED();
-    UserMetrics::RecordAction(UserMetricsAction("BadMessageTerminate_EFD"));
+    content::RecordAction(UserMetricsAction("BadMessageTerminate_EFD"));
     if (process)
       base::KillProcess(process, content::RESULT_CODE_KILLED_BAD_MESSAGE,
                         false);