Changing temporary files on posix to have a . in front so they are hidden on ...

base/file_util_posix.cc

Index: base/file_util_posix.cc
===================================================================
--- base/file_util_posix.cc	(revision 49403)
+++ base/file_util_posix.cc	(working copy)
@@ -74,9 +74,9 @@
 
 
 #if defined(GOOGLE_CHROME_BUILD)
-static const char* kTempFileName = "com.google.chrome.XXXXXX";
+static const char* kTempFileName = ".com.google.chrome.XXXXXX";
 #else
-static const char* kTempFileName = "org.chromium.XXXXXX";
+static const char* kTempFileName = ".org.chromium.XXXXXX";
 #endif
 
 bool AbsolutePath(FilePath* path) {
@@ -174,7 +174,6 @@
     directories.pop();
     success = (rmdir(dir.value().c_str()) == 0);
   }
-
   return success;
 }