Remove base/win/metro.{cc|h} and some associated code

chrome/browser/tab_contents/navigation_metrics_recorder.cc

Index: chrome/browser/tab_contents/navigation_metrics_recorder.cc
diff --git a/chrome/browser/tab_contents/navigation_metrics_recorder.cc b/chrome/browser/tab_contents/navigation_metrics_recorder.cc
index 81fac736701891bbec56d994748e991c836bb0cd..8ee3fdd80a8aeb4aae3ec7fd496eb3e746a524c9 100644
--- a/chrome/browser/tab_contents/navigation_metrics_recorder.cc
+++ b/chrome/browser/tab_contents/navigation_metrics_recorder.cc
@@ -20,7 +20,6 @@
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
-#include "chrome/browser/metro_utils/metro_chrome_win.h"
 #endif
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(NavigationMetricsRecorder);
@@ -49,23 +48,3 @@ void NavigationMetricsRecorder::DidNavigateMainFrame(
                                             details.previous_url);
   }
 }
-
-void NavigationMetricsRecorder::DidStartLoading() {
-#if defined(OS_WIN) && defined(USE_ASH)
-  content::RenderViewHost* rvh = web_contents()->GetRenderViewHost();
-
-  if (rvh && base::win::GetVersion() >= base::win::VERSION_WIN8) {
-    content::RenderWidgetHostView* rwhv = rvh->GetWidget()->GetView();
-    if (rwhv) {
-      gfx::NativeView native_view = rwhv->GetNativeView();
-      if (native_view) {
-        chrome::HostDesktopType desktop =
-            chrome::GetHostDesktopTypeForNativeView(native_view);
-        UMA_HISTOGRAM_ENUMERATION("Win8.PageLoad",
-                                  chrome::GetWin8Environment(desktop),
-                                  chrome::WIN_8_ENVIRONMENT_MAX);
-      }
-    }
-  }
-#endif
-}