Add accelerator table entries for hardware back/forward/refresh/favorites keys on linux aura

chrome/browser/ui/views/accelerator_table.cc

Index: chrome/browser/ui/views/accelerator_table.cc
diff --git a/chrome/browser/ui/views/accelerator_table.cc b/chrome/browser/ui/views/accelerator_table.cc
index 8845a1bb2bb48262e91dc299520febbbdd77283b..9991ed4a1d43d9dedb3b790b179225d4c108cee4 100644
--- a/chrome/browser/ui/views/accelerator_table.cc
+++ b/chrome/browser/ui/views/accelerator_table.cc
@@ -134,12 +134,15 @@ const AcceleratorMapping kAcceleratorMap[] = {
   { ui::VKEY_F11, ui::EF_NONE, IDC_FULLSCREEN },
 
   // Platform-specific key maps.
+#if defined(OS_LINUX)
+  { ui::VKEY_BROWSER_BACK, ui::EF_NONE, IDC_BACK },
+  { ui::VKEY_BROWSER_FORWARD, ui::EF_NONE, IDC_FORWARD },
+#endif  // defined(OS_LINUX)
+
 #if defined(OS_CHROMEOS)
   // On Chrome OS, VKEY_BROWSER_SEARCH is handled in Ash.
-  { ui::VKEY_BROWSER_BACK, ui::EF_NONE, IDC_BACK },
   { ui::VKEY_BACK, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_CLEAR_BROWSING_DATA },
-  { ui::VKEY_BROWSER_FORWARD, ui::EF_NONE, IDC_FORWARD },
   { ui::VKEY_OEM_2, ui::EF_CONTROL_DOWN, IDC_HELP_PAGE_VIA_KEYBOARD },
   { ui::VKEY_OEM_2, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_HELP_PAGE_VIA_KEYBOARD },