Fix browser crash when parsing invalid Settings Override extension

chrome/common/extensions/manifest_handlers/settings_overrides_handler_unittest.cc

 // Copyright 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 "chrome/common/extensions/manifest_handlers/settings_overrides_handler.h"
 
 #include "base/json/json_string_value_serializer.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/extensions/features/feature_channel.h"
 #include "chrome/common/extensions/manifest_url_handler.h"
@@ skipping 14 matching lines @@
     "        \"search_url\" : \"http://www.foo.com/s?q={searchTerms}\","
     "        \"favicon_url\" : \"http://www.foo.com/favicon.ico\","
     "        \"suggest_url\" : \"http://www.foo.com/s?q={searchTerms}\","
     "        \"encoding\" : \"UTF-8\","
     "        \"is_default\" : true"
     "    },"
     "   \"startup_pages\" : [\"http://www.startup.com\"]"
     "  }"
     "}";
 
+const char kBrokenManifest[] = "{"
+    " \"version\" : \"1.0.0.0\","
+    " \"name\" : \"Test\","
+    " \"chrome_settings_overrides\" : {"
+    "   \"homepage\" : \"{invalid}\","
+    "   \"search_provider\" : {"
+    "        \"name\" : \"first\","
+    "        \"keyword\" : \"firstkey\","
+    "        \"search_url\" : \"{invalid}/s?q={searchTerms}\","
+    "        \"favicon_url\" : \"{invalid}/favicon.ico\","
+    "        \"encoding\" : \"UTF-8\","
+    "        \"is_default\" : true"
+    "    },"
+    "   \"startup_pages\" : [\"{invalid}\"]"
+    "  }"
+    "}";
+
 using extensions::api::manifest_types::ChromeSettingsOverrides;
 using extensions::Extension;
 using extensions::Manifest;
 using extensions::SettingsOverrides;
 namespace manifest_keys = extensions::manifest_keys;
 
-class DeclarativeSettingsTest : public testing::Test {
+class OverrideSettingsTest : public testing::Test {
 };
 
 
-TEST_F(DeclarativeSettingsTest, ParseManifest) {
+TEST_F(OverrideSettingsTest, ParseManifest) {
   extensions::ScopedCurrentChannel channel(chrome::VersionInfo::CHANNEL_DEV);
   std::string manifest(kManifest);
   JSONStringValueSerializer json(&manifest);
   std::string error;
   scoped_ptr<base::Value> root(json.Deserialize(NULL, &error));
   ASSERT_TRUE(root);
   ASSERT_TRUE(root->IsType(base::Value::TYPE_DICTIONARY));
   scoped_refptr<Extension> extension = Extension::Create(
       base::FilePath(FILE_PATH_LITERAL("//nonexistent")),
       Manifest::INVALID_LOCATION,
       *static_cast<base::DictionaryValue*>(root.get()),
       Extension::NO_FLAGS,
       &error);
   ASSERT_TRUE(extension);
   ASSERT_TRUE(extension->manifest()->HasPath(manifest_keys::kSettingsOverride));
 
   SettingsOverrides* settings_override = static_cast<SettingsOverrides*>(
-        extension->GetManifestData(manifest_keys::kSettingsOverride));
+      extension->GetManifestData(manifest_keys::kSettingsOverride));
   ASSERT_TRUE(settings_override);
   ASSERT_TRUE(settings_override->search_engine);
   EXPECT_TRUE(settings_override->search_engine->is_default);
   const ChromeSettingsOverrides::Search_provider* search_engine =
       settings_override->search_engine.get();
   EXPECT_EQ("first", search_engine->name);
   EXPECT_EQ("firstkey", search_engine->keyword);
   EXPECT_EQ("http://www.foo.com/s?q={searchTerms}", search_engine->search_url);
   EXPECT_EQ("http://www.foo.com/favicon.ico", search_engine->favicon_url);
   EXPECT_EQ("http://www.foo.com/s?q={searchTerms}",
             *search_engine->suggest_url);
   EXPECT_EQ("UTF-8", search_engine->encoding);
 
   EXPECT_EQ(std::vector<GURL>(1, GURL("http://www.startup.com")),
             settings_override->startup_pages);
 
   ASSERT_TRUE(settings_override->homepage);
   EXPECT_EQ(GURL("http://www.homepage.com"), *settings_override->homepage);
 }
 
+TEST_F(OverrideSettingsTest, ParseBrokenManifest) {
+  extensions::ScopedCurrentChannel channel(chrome::VersionInfo::CHANNEL_DEV);
+  std::string manifest(kBrokenManifest);
+  JSONStringValueSerializer json(&manifest);
+  std::string error;
+  scoped_ptr<base::Value> root(json.Deserialize(NULL, &error));
+  ASSERT_TRUE(root);
+  ASSERT_TRUE(root->IsType(base::Value::TYPE_DICTIONARY));
+  scoped_refptr<Extension> extension = Extension::Create(
+      base::FilePath(FILE_PATH_LITERAL("//nonexistent")),
+      Manifest::INVALID_LOCATION,
+      *static_cast<base::DictionaryValue*>(root.get()),
+      Extension::NO_FLAGS,
+      &error);
+  EXPECT_FALSE(extension);
+  EXPECT_EQ(
+      std::string(extensions::manifest_errors::kInvalidEmptySettingsOverrides),
+      error);
+}
+
 }  // namespace