Use rewriting to make ChromeOS keyboard F<number> keys produce extended keycodes.

chrome/browser/ui/views/frame/browser_view.cc

Index: chrome/browser/ui/views/frame/browser_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_view.cc b/chrome/browser/ui/views/frame/browser_view.cc
index 99d1cac4174c9f78bfcbb023fc034fef77a51e5e..1b5d58b790f3f53699c4ce8c3dff37fe356831ad 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -2636,7 +2636,7 @@ void BrowserView::UpdateAcceleratorMetrics(
     case IDC_BACK:
       if (key_code == ui::VKEY_BACK)
         content::RecordAction(UserMetricsAction("Accel_Back_Backspace"));
-      else if (key_code == ui::VKEY_F1)
+      else if (key_code == ui::VKEY_BROWSER_BACK)
         content::RecordAction(UserMetricsAction("Accel_Back_F1"));
       else if (key_code == ui::VKEY_LEFT)
         content::RecordAction(UserMetricsAction("Accel_Back_Left"));
@@ -2644,7 +2644,7 @@ void BrowserView::UpdateAcceleratorMetrics(
     case IDC_FORWARD:
       if (key_code == ui::VKEY_BACK)
         content::RecordAction(UserMetricsAction("Accel_Forward_Backspace"));
-      else if (key_code == ui::VKEY_F2)
+      else if (key_code == ui::VKEY_BROWSER_FORWARD)
         content::RecordAction(UserMetricsAction("Accel_Forward_F2"));
       else if (key_code == ui::VKEY_RIGHT)
         content::RecordAction(UserMetricsAction("Accel_Forward_Right"));
@@ -2653,11 +2653,11 @@ void BrowserView::UpdateAcceleratorMetrics(
     case IDC_RELOAD_IGNORING_CACHE:
       if (key_code == ui::VKEY_R)
         content::RecordAction(UserMetricsAction("Accel_Reload_R"));
-      else if (key_code == ui::VKEY_F3)
+      else if (key_code == ui::VKEY_BROWSER_REFRESH)
         content::RecordAction(UserMetricsAction("Accel_Reload_F3"));
       break;
     case IDC_FULLSCREEN:
-      if (key_code == ui::VKEY_F4)
+      if (key_code == ui::VKEY_MEDIA_LAUNCH_APP2)
         content::RecordAction(UserMetricsAction("Accel_Fullscreen_F4"));
       break;
     case IDC_FOCUS_LOCATION: