Revert "[CRD iOS] Translate "\n" into an enter keypress"

This reverts commit 8b79a3c6.

Reason for revert: This change is not good enough to fix the keypress issue we see. We need to rework the way we send keypress, which will undo the change we do here.

Original change's description:
> [CRD iOS] Translate "\n" into an enter keypress
> 
> iOS is sending a "\n" unicode text event to the host when the user taps
> the `return` key. On Windows this doesn't always generate a newline.
> 
> This CL fixes this issue by translating the "\n" text event into a
> ENTER keypress before sending it to the host.
> 
> Bug: 830959
> Change-Id: Ib94caf6ce2036cc5654f1b59f1e0136c81c9eec1
> Reviewed-on: https://chromium-review.googlesource.com/1003598
> Commit-Queue: Yuwei Huang <yuweih@chromium.org>
> Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#549385}

TBR=jamiewalch@chromium.org,yuweih@chromium.org

Change-Id: Icba4c28dccc7154f30a41b90dc2cbc62feae2824
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 830959
Reviewed-on: https://chromium-review.googlesource.com/1005697Reviewed-by: Yuwei Huang <yuweih@chromium.org>
Commit-Queue: Yuwei Huang <yuweih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549633}

remoting/client/input/keyboard_interpreter.cc

@@ -85,16 +85,4 @@ void KeyboardInterpreter::HandlePrintScreenEvent() {
   input_strategy_->HandleKeysEvent(keys);
 }
 
-void KeyboardInterpreter::HandleEnterEvent() {
-  if (!input_strategy_) {
-    return;
-  }
-
-  base::queue<KeyEvent> keys;
-  keys.push({static_cast<uint32_t>(ui::DomCode::ENTER), true});
-  keys.push({static_cast<uint32_t>(ui::DomCode::ENTER), false});
-  input_strategy_->HandleKeysEvent(keys);
-  return;
-}
-
 }  // namespace remoting

remoting/client/input/keyboard_interpreter.h

@@ -35,10 +35,6 @@ class KeyboardInterpreter {
   // Assembles PRINT_SCREEN key event and then delegates to
   // |KeyboardInputStrategy| send the keys.
   void HandlePrintScreenEvent();
-  // Assembles ENTER key event and then delegates to |KeyboardInputStrategy| to
-  // send the keys. Do not send a single "\n" text event to the host to inject
-  // enter as it has undefined behavior on Windows.
-  void HandleEnterEvent();
 
  private:
   std::unique_ptr<KeyboardInputStrategy> input_strategy_;

remoting/ios/app/host_view_controller.mm

@@ -326,10 +326,6 @@ static NSString* const kFeedbackContext = @"InSessionFeedbackContext";
                                                0);
 }
 
-- (void)clientKeyboardShouldSendEnter {
-  _client.keyboardInterpreter->HandleEnterEvent();
-}
-
 - (void)clientKeyboardShouldDelete {
   _client.keyboardInterpreter->HandleDeleteEvent(0);
 }

remoting/ios/client_keyboard.h

@@ -10,7 +10,6 @@
 
 @protocol ClientKeyboardDelegate<NSObject>
 - (void)clientKeyboardShouldSend:(NSString*)text;
-- (void)clientKeyboardShouldSendEnter;
 - (void)clientKeyboardShouldDelete;
 @end
 

remoting/ios/client_keyboard.mm

@@ -49,11 +49,7 @@
 #pragma mark - UIKeyInput
 
 - (void)insertText:(NSString*)text {
-  if ([text isEqualToString:@"\n"]) {
-    [_delegate clientKeyboardShouldSendEnter];
-  } else {
-    [_delegate clientKeyboardShouldSend:text];
-  }
+  [_delegate clientKeyboardShouldSend:text];
 }
 
 - (void)deleteBackward {