Enforce lowercase switches when calling CommandLine::HasSwitch(const char*).

base/command_line.h

Index: base/command_line.h
diff --git a/base/command_line.h b/base/command_line.h
index 19df40c4c478bfa9befe59ad9eefc63f5b33c55f..439921ed6e50ae08a7054740b4559ee0546d3e71 100644
--- a/base/command_line.h
+++ b/base/command_line.h
@@ -142,7 +142,7 @@ 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;