Replace most LOG statements with DLOG statements in base.

base/command_line.cc

Index: base/command_line.cc
===================================================================
--- base/command_line.cc	(revision 106858)
+++ base/command_line.cc	(working copy)
@@ -268,8 +268,8 @@
     const std::string& switch_string) const {
   StringType value = GetSwitchValueNative(switch_string);
   if (!IsStringASCII(value)) {
-    LOG(WARNING) << "Value of switch (" << switch_string << ") must be ASCII.";
-    return "";
+    DLOG(WARNING) << "Value of switch (" << switch_string << ") must be ASCII.";
+    return std::string();
   }
 #if defined(OS_WIN)
   return WideToASCII(value);
@@ -394,8 +394,8 @@
   wchar_t** args = NULL;
   args = ::CommandLineToArgvW(command_line_string.c_str(), &num_args);
 
-  PLOG_IF(FATAL, !args) << "CommandLineToArgvW failed on command line: " <<
-                           command_line;
+  DPLOG_IF(FATAL, !args) << "CommandLineToArgvW failed on command line: "
+                         << command_line;
   InitFromArgv(num_args, args);
   LocalFree(args);
 }