Automatically remap Command key on an Apple keyboard to Control [part 1 of 2 - Ash part]

Add key_rewriter_event_filter.h which allows its delegate to rewrite or delete an aura::KeyEvent. The new interface will be used for implementing the following three features:

* crosbug.com/25097: Remap keys on external keyboards (R19)
* crosbug.com/27167: Consider adding a way to send function keys to web pages (R20)
* crbug.com/115112: Move modifier remapping code from X to Chrome (M20)

Part 2 of 2: http://codereview.chromium.org/9854025/

BUG=chromium-os:25097
BUG=chromium-os:27167
BUG=115112
TEST=try

Review URL: https://chromiumcodereview.appspot.com/9838010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@129076 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 2 deletions

diff --git a/ash/shell.h b/ash/shell.h
index 10f972a..2c864ad 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -64,6 +64,7 @@ class DragDropController;
 class EventClientImpl;
 class FocusCycler;
 class InputMethodEventFilter;
+class KeyRewriterEventFilter;
 class MonitorController;
 class PartialScreenshotEventFilter;
 class ResizeShadowController;
@@ -178,6 +179,9 @@ class ASH_EXPORT Shell {
   internal::TooltipController* tooltip_controller() {
     return tooltip_controller_.get();
   }
+  internal::KeyRewriterEventFilter* key_rewriter_filter() {
+    return key_rewriter_filter_.get();
+  }
   internal::PartialScreenshotEventFilter* partial_screenshot_filter() {
     return partial_screenshot_filter_.get();
   }
@@ -296,8 +300,8 @@ class ASH_EXPORT Shell {
   scoped_ptr<internal::EventClientImpl> event_client_;
   scoped_ptr<internal::MonitorController> monitor_controller_;
 
-  // An event filter that pre-handles all key events to send them to an IME.
-  scoped_ptr<internal::InputMethodEventFilter> input_method_filter_;
+  // An event filter that rewrites or drops a key event.
+  scoped_ptr<internal::KeyRewriterEventFilter> key_rewriter_filter_;
 
   // An event filter that pre-handles key events while the partial
   // screenshot UI is active.
@@ -308,6 +312,9 @@ class ASH_EXPORT Shell {
   scoped_ptr<internal::AcceleratorFilter> accelerator_filter_;
 #endif
 
+  // An event filter that pre-handles all key events to send them to an IME.
+  scoped_ptr<internal::InputMethodEventFilter> input_method_filter_;
+
   // The shelf for managing the launcher and the status widget in non-compact
   // mode. Shell does not own the shelf. Instead, it is owned by container of
   // the status area.