Add key based scrolling on magnified screen for kiosk mode.

ash/accelerators/accelerator_table.cc

Index: ash/accelerators/accelerator_table.cc
diff --git a/ash/accelerators/accelerator_table.cc b/ash/accelerators/accelerator_table.cc
index a3303f6ec21f53a8c0efafb7102b141dfc52bef4..7caabc23e4d2a979e5245fc0e9890fd3726bea3a 100644
--- a/ash/accelerators/accelerator_table.cc
+++ b/ash/accelerators/accelerator_table.cc
@@ -433,4 +433,22 @@ const AcceleratorAction kActionsNeedingWindow[] = {
 
 const size_t kActionsNeedingWindowLength = arraysize(kActionsNeedingWindow);
 
+#if defined(OS_CHROMEOS)
+// We're using NUMPAD keys as they're most likely unused in kiosk mode.
+const AcceleratorData kMagnifierAcceleratorData[] = {
+  { true, ui::VKEY_NUMPAD6, ui::EF_SHIFT_DOWN, MAGNIFY_SCREEN_UP },
+  { true, ui::VKEY_NUMPAD7, ui::EF_SHIFT_DOWN, MAGNIFY_SCREEN_DOWN },
+  { true, ui::VKEY_NUMPAD8, ui::EF_SHIFT_DOWN, MAGNIFY_SCREEN_LEFT },
+  { true, ui::VKEY_NUMPAD9, ui::EF_SHIFT_DOWN, MAGNIFY_SCREEN_RIGHT },
+
+  { false, ui::VKEY_NUMPAD6, ui::EF_NONE, MAGNIFY_SCREEN_STOP_SCROLL },
+  { false, ui::VKEY_NUMPAD7, ui::EF_NONE, MAGNIFY_SCREEN_STOP_SCROLL },
+  { false, ui::VKEY_NUMPAD8, ui::EF_NONE, MAGNIFY_SCREEN_STOP_SCROLL },
+  { false, ui::VKEY_NUMPAD9, ui::EF_NONE, MAGNIFY_SCREEN_STOP_SCROLL },
+};
+
+const size_t kMagnifierAcceleratorDataLength =
+    arraysize(kMagnifierAcceleratorData);
+#endif
+
 }  // namespace ash