Fix CheckFalseTest.CheckFails on Linux after my change to ui_test.

base/path_service.cc

 // Copyright (c) 2006-2008 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 "base/path_service.h"
 
 #ifdef OS_WIN
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 13 matching lines @@
 #elif defined(OS_MACOSX)
   bool PathProviderMac(int key, FilePath* result);
 #elif defined(OS_POSIX)
   bool PathProviderPosix(int key, FilePath* result);
 #endif
 }
 
 namespace {
 
 typedef base::hash_map<int, FilePath> PathMap;
-typedef base::hash_set<int> PathSet;
 
 // We keep a linked list of providers.  In a debug build we ensure that no two
 // providers claim overlapping keys.
 struct Provider {
   PathService::ProviderFunc func;
   struct Provider* next;
 #ifndef NDEBUG
   int key_start;
   int key_end;
 #endif
@@ skipping 42 matching lines @@
   0,
   0,
 #endif
   true
 };
 #endif
 
 
 struct PathData {
   Lock      lock;
-  PathMap   cache;      // Track mappings from path key to path value.
-  PathSet   overrides;  // Track whether a path has been overridden.
+  PathMap   cache;      // Cache mappings from path key to path value.
+  PathMap   overrides;  // Track path overrides.
   Provider* providers;  // Linked list of path service providers.
 
   PathData() {
 #if defined(OS_WIN)
     providers = &base_provider_win;
 #elif defined(OS_MACOSX)
     providers = &base_provider_mac;
 #elif defined(OS_POSIX)
     providers = &base_provider_posix;
 #endif
@@ skipping 25 matching lines @@
   // check for a cached version
   PathMap::const_iterator it = path_data->cache.find(key);
   if (it != path_data->cache.end()) {
     *result = it->second;
     return true;
   }
   return false;
 }
 
 // static
+bool PathService::GetFromOverrides(int key, FilePath* result) {
+  PathData* path_data = GetPathData();
+  AutoLock scoped_lock(path_data->lock);
+
+  // check for an overriden version.
+  PathMap::const_iterator it = path_data->overrides.find(key);
+  if (it != path_data->overrides.end()) {
+    *result = it->second;
+    return true;
+  }
+  return false;
+}
+
+// static
 void PathService::AddToCache(int key, const FilePath& path) {
   PathData* path_data = GetPathData();
   AutoLock scoped_lock(path_data->lock);
   // Save the computed path in our cache.
   path_data->cache[key] = path;
 }
 
 // TODO(brettw): this function does not handle long paths (filename > MAX_PATH)
 // characters). This isn't supported very well by Windows right now, so it is
 // moot, but we should keep this in mind for the future.
 // static
 bool PathService::Get(int key, FilePath* result) {
   PathData* path_data = GetPathData();
   DCHECK(path_data);
   DCHECK(result);
   DCHECK(key >= base::DIR_CURRENT);
 
   // special case the current directory because it can never be cached
   if (key == base::DIR_CURRENT)
     return file_util::GetCurrentDirectory(result);
 
   if (GetFromCache(key, result))
     return true;
 
+  if (GetFromOverrides(key, result))
+    return true;
+
   FilePath path;
 
   // search providers for the requested path
   // NOTE: it should be safe to iterate here without the lock
   // since RegisterProvider always prepends.
   Provider* provider = path_data->providers;
   while (provider) {
     if (provider->func(key, &path))
       break;
     DCHECK(path.empty()) << "provider should not have modified path";
@@ skipping 14 matching lines @@
 bool PathService::Get(int key, std::wstring* result) {
   // Deprecated compatibility function.
   FilePath path;
   if (!Get(key, &path))
     return false;
   *result = path.ToWStringHack();
   return true;
 }
 #endif
 
-bool PathService::IsOverridden(int key) {
-  PathData* path_data = GetPathData();
-  DCHECK(path_data);
-
-  AutoLock scoped_lock(path_data->lock);
-  return path_data->overrides.find(key) != path_data->overrides.end();
-}
-
 bool PathService::Override(int key, const FilePath& path) {
   PathData* path_data = GetPathData();
   DCHECK(path_data);
   DCHECK(key > base::DIR_CURRENT) << "invalid path key";
 
   FilePath file_path = path;
 
   // Make sure the directory exists. We need to do this before we translate
   // this to the absolute path because on POSIX, AbsolutePath fails if called
   // on a non-existant path.
   if (!file_util::PathExists(file_path) &&
       !file_util::CreateDirectory(file_path))
     return false;
 
   // We need to have an absolute path, as extensions and plugins don't like
   // relative paths, and will glady crash the browser in CHECK()s if they get a
   // relative path.
   if (!file_util::AbsolutePath(&file_path))
     return false;
 
   AutoLock scoped_lock(path_data->lock);
+
+  // Clear the cache now. Some of its entries could have depended
+  // on the value we are overriding, and are now out of sync with reality.
+  path_data->cache.clear();
+
   path_data->cache[key] = file_path;
-  path_data->overrides.insert(key);
+  path_data->overrides[key] = file_path;
+
   return true;
 }
 
 void PathService::RegisterProvider(ProviderFunc func, int key_start,
                                    int key_end) {
   PathData* path_data = GetPathData();
   DCHECK(path_data);
   DCHECK(key_end > key_start);
 
   AutoLock scoped_lock(path_data->lock);
@@ skipping 12 matching lines @@
   p = new Provider;
   p->is_static = false;
   p->func = func;
   p->next = path_data->providers;
 #ifndef NDEBUG
   p->key_start = key_start;
   p->key_end = key_end;
 #endif
   path_data->providers = p;
 }