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

chrome/browser/ui/ash/event_rewriter.h

Index: chrome/browser/ui/ash/event_rewriter.h
diff --git a/chrome/browser/ui/ash/event_rewriter.h b/chrome/browser/ui/ash/event_rewriter.h
index c0e81a9e6f2c6750f65f006cc769acd8a051a8a2..54b67fe0ec0b913b17a198018d098135984f062d 100644
--- a/chrome/browser/ui/ash/event_rewriter.h
+++ b/chrome/browser/ui/ash/event_rewriter.h
@@ -126,6 +126,11 @@ class EventRewriter : public ash::EventRewriterDelegate,
   // Returns true whn the |event| is rewritten.
   bool RewriteBackspaceAndArrowKeys(ui::KeyEvent* event);
 
+  // When the Search key acts as a function key, it remaps Search+1
+  // through Search+= to F1 through F12. Returns true whn the |event| is
+  // rewritten.
+  bool RewriteFunctionKeys(ui::KeyEvent* event);
+
 #if defined(OS_CHROMEOS)
   // When the Search key acts as a function key, it drops Search key presses,
   // and drops the release as well if any key is pressed while Search was down.
@@ -202,6 +207,17 @@ class EventRewriter : public ash::EventRewriterDelegate,
   unsigned int f10_xkeycode_;
   unsigned int f11_xkeycode_;
   unsigned int f12_xkeycode_;
+  unsigned int browser_back_xkeycode_;
+  unsigned int browser_forward_xkeycode_;
+  unsigned int browser_refresh_xkeycode_;
+  unsigned int media_launch_app1_xkeycode_;
+  unsigned int media_launch_app2_xkeycode_;
+  unsigned int brightness_down_xkeycode_;
+  unsigned int brightness_up_xkeycode_;
+  unsigned int volume_mute_xkeycode_;
+  unsigned int volume_down_xkeycode_;
+  unsigned int volume_up_xkeycode_;
+  unsigned int power_xkeycode_;
 
   chromeos::input_method::XKeyboard* xkeyboard_;  // for testing.
 #endif