Make tests that rely on getting a temp dir exit if they don't.

It may be the case that some tests march onward with the wrong
directory and then do something bad.

Review URL: http://codereview.chromium.org/3033037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@54024 0039d316-1c4b-4281-b951-d872f2087c98

webkit/appcache/appcache_database_unittest.cc

@@ -54,7 +54,7 @@ TEST(AppCacheDatabaseTest, LazyOpen) {
 TEST(AppCacheDatabaseTest, ReCreate) {
   // Real files on disk for this test.
   ScopedTempDir temp_dir;
-  EXPECT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   const FilePath kDbFile = temp_dir.path().AppendASCII("appcache.db");
   const FilePath kNestedDir = temp_dir.path().AppendASCII("nested");
   const FilePath kOtherFile =  kNestedDir.AppendASCII("other_file");

webkit/database/database_tracker_unittest.cc

@@ -82,7 +82,7 @@ class DatabaseTracker_TestHelper_Test {
   static void TestDeleteOpenDatabase(bool incognito_mode) {
     // Initialize the tracker database.
     ScopedTempDir temp_dir;
-    EXPECT_TRUE(temp_dir.CreateUniqueTempDir());
+    ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
     scoped_refptr<DatabaseTracker> tracker(
         new DatabaseTracker(temp_dir.path(), incognito_mode));
 
@@ -181,7 +181,7 @@ class DatabaseTracker_TestHelper_Test {
   static void TestDatabaseTracker(bool incognito_mode) {
     // Initialize the tracker database.
     ScopedTempDir temp_dir;
-    EXPECT_TRUE(temp_dir.CreateUniqueTempDir());
+    ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
     scoped_refptr<DatabaseTracker> tracker(
         new DatabaseTracker(temp_dir.path(), incognito_mode));