Revert 217768 "Adding key press detection in the browser process."

> Adding key press detection in the browser process.
> It works like this on the browser side: 
> A new object KeyPressMonitor is created on BrowserMainLoop and passed to AudioInputRendererHost to pass to AudioInputController.
> AudioInputController::DoRecord calls KeyPressMonitor::AddKeyPressListener --> KeyPressMonitor listens to system key events through UserInputMonitor(only implemented on Linux) --> AudioInputController::OnKeyPressed is called and sets key_pressed_ --> When AudioInputController::OnData called, it writes key_pressed_ to shared memory along with the audio data buffer.
> On the renderer side a new param "key_pressed" is added through the code path of passing the flag to the webrtc voice engine.
> This CL includes all these changes except the implementation of UserInputMonitor for Windows and Mac. The impl of UserInputMonitor is mostly copied from remoting/host/local_input_monitor_linux.cc
> 
> 
> BUG=
> 
> Review URL: https://chromiumcodereview.appspot.com/21183002

TBR=jiayl@chromium.org

Review URL: https://codereview.chromium.org/22871007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@217774 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 9 deletions

diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 4194aa8..c51b5c5 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -52,7 +52,6 @@
 #include "crypto/nss_util.h"
 #include "media/audio/audio_manager.h"
 #include "media/base/media.h"
-#include "media/base/user_input_monitor.h"
 #include "media/midi/midi_manager.h"
 #include "net/base/network_change_notifier.h"
 #include "net/socket/client_socket_factory.h"
@@ -873,14 +872,6 @@ int BrowserMainLoop::BrowserThreadsStarted() {
         audio_manager_.get(), media_stream_manager_.get()));
   }
 
-  {
-    TRACE_EVENT0(
-        "startup",
-        "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
-    user_input_monitor_ = media::UserInputMonitor::Create(
-        io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
-  }
-
   // Alert the clipboard class to which threads are allowed to access the
   // clipboard:
   std::vector<base::PlatformThreadId> allowed_clipboard_threads;