Fix AutocompleteMatch DCHECK() triggered by |RenderViewContextMenu::AppendSearchProvider()|.

base/string_util_unittest.cc

 // Copyright (c) 2011 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 <math.h>
 #include <stdarg.h>
 
 #include <limits>
 #include <sstream>
 
@@ skipping 1048 matching lines @@
   // No characters match kRemoveChars.
   EXPECT_FALSE(RemoveChars(input, kRemoveChars, &input));
   EXPECT_EQ("Abcd!", input);
 
   // Empty string.
   input.clear();
   EXPECT_FALSE(RemoveChars(input, kRemoveChars, &input));
   EXPECT_EQ(std::string(), input);
 }
 
+TEST(StringUtilTest, ReplaceChars) {
+  struct TestData {
+    const char* input;
+    const char* replace_chars;
+    const char* replace_with;
+    const char* output;
+    bool result;
+  } cases[] = {
+    { "", "", "", "", false },
+    { "test", "", "", "test", false },
+    { "test", "", "!", "test", false },
+    { "test", "z", "!", "test", false },
+    { "test", "e", "!", "t!st", true },
+    { "test", "e", "!?", "t!?st", true },
+    { "test", "ez", "!", "t!st", true },
+    { "test", "zed", "!?", "t!?st", true },
+    { "test", "t", "!?", "!?es!?", true },
+    { "test", "et", "!>", "!>!>s!>", true },
+    { "test", "zest", "!", "!!!!", true },
+    { "test", "szt", "!", "!e!!", true },
+  };
+
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
+    std::string output;
+    bool result = ReplaceChars(cases[i].input,
+                               cases[i].replace_chars,
+                               cases[i].replace_with,
+                               &output);
+    EXPECT_EQ(cases[i].result, result);
+    EXPECT_EQ(cases[i].output, output);
+  }
+}
+
 TEST(StringUtilTest, ContainsOnlyChars) {
   // Providing an empty list of characters should return false but for the empty
   // string.
   EXPECT_TRUE(ContainsOnlyChars("", ""));
   EXPECT_FALSE(ContainsOnlyChars("Hello", ""));
 
   EXPECT_TRUE(ContainsOnlyChars("", "1234"));
   EXPECT_TRUE(ContainsOnlyChars("1", "1234"));
   EXPECT_TRUE(ContainsOnlyChars("1", "4321"));
   EXPECT_TRUE(ContainsOnlyChars("123", "4321"));
@@ skipping 36 matching lines @@
   const std::string live = kLive;
   std::string dead = live;
   strncpy(WriteInto(&dead, 5), kDead, 4);
   EXPECT_STREQ(kDead, dead.c_str());
   EXPECT_EQ(4u, dead.size());
   EXPECT_STREQ(kLive, live.c_str());
   EXPECT_EQ(4u, live.size());
 }
 
 }  // namespace base