Make IsGestureTyping enabled on by default.

ui/keyboard/keyboard_util.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/keyboard/keyboard_util.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 166 matching lines @@
 
 bool IsFloatingVirtualKeyboardEnabled() {
   std::string floating_virtual_keyboard_switch =
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kFloatingVirtualKeyboard);
   return floating_virtual_keyboard_switch ==
       switches::kFloatingVirtualKeyboardEnabled;
 }
 
 bool IsGestureTypingEnabled() {
-  std::string keyboard_switch =
-      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-          switches::kGestureTyping);
-  return keyboard_switch == switches::kGestureTypingEnabled;

[bshe, 2015/09/04 14:07:25]

perhaps just do:
keyboard_switch != switches::kGestureTypingDisabled ?

[SteveT, 2015/09/04 17:50:13]

Oh right, because GetSwitchValueASCII returns "" if it's not provided. OK!

+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kGestureTyping)) {
+    return base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+            switches::kGestureTyping) == switches::kGestureTypingEnabled;
+  }
+  // Default value if no command line flags specified.
+  return true;
 }
 
 bool IsGestureEditingEnabled() {
   std::string keyboard_switch =
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kGestureEditing);
   return keyboard_switch == switches::kGestureEditingEnabled;
 }
 
 bool IsSmartDeployEnabled() {
@@ skipping 272 matching lines @@
 }
 
 void LogKeyboardControlEvent(KeyboardControlEvent event) {
   UMA_HISTOGRAM_ENUMERATION(
       "VirtualKeyboard.KeyboardControlEvent",
       event,
       keyboard::KEYBOARD_CONTROL_MAX);
 }
 
 }  // namespace keyboard