Enable keyboard filters in PNaCl client

remoting/client/plugin/normalizing_input_filter_mac.cc

Index: remoting/client/plugin/normalizing_input_filter_mac.cc
diff --git a/remoting/client/plugin/normalizing_input_filter_mac.cc b/remoting/client/plugin/normalizing_input_filter_mac.cc
index 56b327eefc10d40bb6402d91f61bd61c8af961ed..36708e9409eda2d6b8709fac8e2ecfdb24334d36 100644
--- a/remoting/client/plugin/normalizing_input_filter_mac.cc
+++ b/remoting/client/plugin/normalizing_input_filter_mac.cc
@@ -2,42 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// NormalizingInputFilterMac is designed to solve the problem of missing keyup
-// events on Mac.
-//
-// PROBLEM
-//
-// On Mac if user presses CMD and then C key there is no keyup event generated
-// for C when user releases the C key before the CMD key.
-// The cause is that CMD + C triggers a system action and Chrome injects only a
-// keydown event for the C key. Safari shares the same behavior.
-//
-// SOLUTION
-//
-// When a keyup event for CMD key happens we will check all prior keydown
-// events received and inject corresponding keyup events artificially, with
-// the exception of:
-//
-// SHIFT, CONTROL, OPTION, LEFT CMD, RIGHT CMD and CAPS LOCK
-//
-// because they are reported by Chrome correctly.
-//
-// There are a couple cases that this solution doesn't work perfectly, one
-// of them leads to duplicated keyup events.
-//
-// User performs this sequence of actions:
-//
-// CMD DOWN, C DOWN, CMD UP, C UP
-//
-// In this case the algorithm will generate:
-//
-// CMD DOWN, C DOWN, C UP, CMD UP, C UP
-//
-// Because we artificially generate keyup events the C UP event is duplicated
-// as user releases the key after CMD key. This would not be a problem as the
-// receiver end will drop this duplicated keyup event.
-
-#include "remoting/client/plugin/normalizing_input_filter.h"
+#include "remoting/client/plugin/normalizing_input_filter_mac.h"
 
 #include <map>
 #include <vector>
@@ -62,30 +27,13 @@ const unsigned int kUsbTab          = 0x07002b;
 
 }  // namespace
 
-class NormalizingInputFilterMac : public protocol::InputFilter {
- public:
-  explicit NormalizingInputFilterMac(protocol::InputStub* input_stub);
-  virtual ~NormalizingInputFilterMac() {}
-
-  // InputFilter overrides.
-  virtual void InjectKeyEvent(const protocol::KeyEvent& event) OVERRIDE;
-
- private:
-  // Generate keyup events for any keys pressed with CMD.
-  void GenerateKeyupEvents();
-
-  // A map that stores pressed keycodes and the corresponding key event.
-  typedef std::map<int, protocol::KeyEvent> KeyPressedMap;
-  KeyPressedMap key_pressed_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(NormalizingInputFilterMac);
-};
-
 NormalizingInputFilterMac::NormalizingInputFilterMac(
     protocol::InputStub* input_stub)
     : protocol::InputFilter(input_stub) {
 }
 
+NormalizingInputFilterMac::~NormalizingInputFilterMac() {}
+
 void NormalizingInputFilterMac::InjectKeyEvent(const protocol::KeyEvent& event)
 {
   DCHECK(event.has_usb_keycode());
@@ -145,10 +93,4 @@ void NormalizingInputFilterMac::GenerateKeyupEvents() {
   key_pressed_map_.clear();
 }
 
-scoped_ptr<protocol::InputFilter> CreateNormalizingInputFilter(
-    protocol::InputStub* input_stub) {
-  return scoped_ptr<protocol::InputFilter>(
-      new NormalizingInputFilterMac(input_stub));
-}
-
 }  // namespace remoting