Add mozc input logic IME feature.

Bug: 937152
Change-Id: Iecba7262a97ae67d2cf76ffa8fa3100f1628f864
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1852348Reviewed-by: Darren Shen <shend@chromium.org>
Reviewed-by: Leo Zhang <googleo@chromium.org>
Commit-Queue: Leo Zhang <googleo@chromium.org>
Auto-Submit: Leo Zhang <googleo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704968}

chrome/browser/extensions/api/virtual_keyboard_private/chrome_virtual_keyboard_delegate.cc

@@ -389,6 +389,9 @@ void ChromeVirtualKeyboardDelegate::OnHasInputDevices(
       "floatingkeyboarddefault",
       base::FeatureList::IsEnabled(
           chromeos::features::kVirtualKeyboardFloatingDefault)));
+  features->AppendString(GenerateFeatureFlag(
+      "mozcinputlogic",
+      base::FeatureList::IsEnabled(chromeos::features::kImeInputLogicMozc)));
 
   results->Set("features", std::move(features));
 

chromeos/constants/chromeos_features.cc

@@ -147,6 +147,11 @@ const base::Feature kImeInputLogicFst{"ImeInputLogicFst",
 const base::Feature kImeInputLogicFstNonEnglish{
     "ImeInputLogicFstNonEnglish", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enable or disable Unified Input Logic for Mozc decoder in the IME extension
+// on Chrome OS.
+const base::Feature kImeInputLogicMozc{"ImeInputLogicMozc",
+                                       base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Enable or disable IME service decoder engine and 'ime' sandbox on Chrome OS.
 const base::Feature kImeDecoderWithSandbox{"ImeDecoderWithSandbox",
                                            base::FEATURE_DISABLED_BY_DEFAULT};

chromeos/constants/chromeos_features.h

@@ -72,6 +72,8 @@ extern const base::Feature kImeInputLogicFst;
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const base::Feature kImeInputLogicFstNonEnglish;
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
+extern const base::Feature kImeInputLogicMozc;
+COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const base::Feature kImeDecoderWithSandbox;
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const base::Feature kVirtualKeyboardFloatingDefault;