Make sure only the right processes can access the profile path.

base/path_service.cc

Index: base/path_service.cc
diff --git a/base/path_service.cc b/base/path_service.cc
index 47278c39dff2cba0a99f8b7c47781d3489fdadbb..aabc4961ff351c019536e5af876cf062c64bf9f6 100644
--- a/base/path_service.cc
+++ b/base/path_service.cc
@@ -222,18 +222,27 @@ bool PathService::Get(int key, FilePath* result) {
 }
 
 bool PathService::Override(int key, const FilePath& path) {
+  // Just call the full function with true for the value of |create|.
+  return Override(key, path, true);
+}
+
+bool PathService::Override(int key, const FilePath& path, bool create) {
   PathData* path_data = GetPathData();
   DCHECK(path_data);
   DCHECK_GT(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-existent path.
-  if (!file_util::PathExists(file_path) &&
-      !file_util::CreateDirectory(file_path))
-    return false;
+  // For some locations this will fail if called from inside the sandbox there-
+  // fore we protect this call with a flag.
+  if (create) {
+    // 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-existent 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 gladly crash the browser in CHECK()s if they get a