Do not try to get a display name from an input method ID which starts with "_ext_ime".

chrome/browser/chromeos/input_method/input_method_util_unittest.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/input_method/input_method_util.h"
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
@@ skipping 12 matching lines @@
 #define TestGetFirstLoginInputMethodIds_Us_And_Ru \
   DISABLED_TestGetFirstLoginInputMethodIds_Us_And_Ru
 #define TestGetInputMethodDescriptorFromXkbId \
   DISABLED_TestGetInputMethodDescriptorFromXkbId
 #define TestGetKeyboardLayoutName DISABLED_TestGetKeyboardLayoutName
 #define TestGetLanguageCodesFromInputMethodIds \
   DISABLED_TestGetLanguageCodesFromInputMethodIds
 #endif  // USE_VIRTUAL_KEYBOARD
 
 namespace chromeos {
+
+extern const char* kExtensionImePrefix;
+
 namespace input_method {
 
 namespace {
 
 InputMethodDescriptor GetDesc(IBusController* controller,
                               const std::string& id,
                               const std::string& raw_layout,
                               const std::string& language_code) {
   return controller->CreateInputMethodDescriptor(id, "", raw_layout,
                                                  language_code);
@@ skipping 143 matching lines @@
   EXPECT_FALSE(util_.StringIsSupported("####THIS_STRING_IS_NOT_SUPPORTED####"));
   EXPECT_TRUE(util_.StringIsSupported("Chinese"));
   EXPECT_TRUE(util_.StringIsSupported("_Chinese"));
 }
 
 TEST_F(InputMethodUtilTest, TestIsKeyboardLayout) {
   EXPECT_TRUE(InputMethodUtil::IsKeyboardLayout("xkb:us::eng"));
   EXPECT_FALSE(InputMethodUtil::IsKeyboardLayout("mozc"));
 }
 
+TEST_F(InputMethodUtilTest, TestExtensionInputMethod) {
+  EXPECT_TRUE(InputMethodUtil::IsExtensionInputMethod(
+      kExtensionImePrefix + std::string("123abc")));
+  EXPECT_FALSE(InputMethodUtil::IsExtensionInputMethod(""));
+  EXPECT_FALSE(InputMethodUtil::IsExtensionInputMethod("mozc"));
+}
+
 TEST_F(InputMethodUtilTest, TestGetKeyboardLayoutName) {
   // Unsupported case.
   EXPECT_EQ("", util_.GetKeyboardLayoutName("UNSUPPORTED_ID"));
 
   // Supported cases (samples).
   EXPECT_EQ("jp", util_.GetKeyboardLayoutName("mozc-jp"));
   EXPECT_EQ("us", util_.GetKeyboardLayoutName("pinyin"));
   EXPECT_EQ("us(dvorak)", util_.GetKeyboardLayoutName("pinyin-dv"));
   EXPECT_EQ("us", util_.GetKeyboardLayoutName("m17n:ar:kbd"));
   EXPECT_EQ("es", util_.GetKeyboardLayoutName("xkb:es::spa"));
@@ skipping 237 matching lines @@
     EXPECT_FALSE(display_name.empty())
         << "Invalid language code " << language_code;
     // On error, GetDisplayNameForLocale() returns the |language_code| as-is.
     EXPECT_NE(language_code, UTF16ToUTF8(display_name))
         << "Invalid language code " << language_code;
   }
 }
 
 }  // namespace input_method
 }  // namespace chromeos