Update from https://crrev.com/327068

base/command_line.h

Index: base/command_line.h
diff --git a/base/command_line.h b/base/command_line.h
index 85d924a8d31dcf743507ceb518a1cddfb91579b7..439921ed6e50ae08a7054740b4559ee0546d3e71 100644
--- a/base/command_line.h
+++ b/base/command_line.h
@@ -142,8 +142,11 @@ class BASE_EXPORT CommandLine {
   void SetProgram(const FilePath& program);
 
   // Returns true if this command line contains the given switch.
-  // (Switch names are case-insensitive).
+  // Switch names should only be lowercase.
+  // The second override provides an optimized version to avoid inlining the
+  // codegen for the string allocation.
   bool HasSwitch(const std::string& switch_string) const;
+  bool HasSwitch(const char switch_constant[]) const;
 
   // Returns the value associated with the given switch. If the switch has no
   // value or isn't present, this method returns the empty string.