Implement first part of supporting global extension commands.

chrome/common/extensions/command.h

Index: chrome/common/extensions/command.h
diff --git a/chrome/common/extensions/command.h b/chrome/common/extensions/command.h
index 963d26ba885ffa45440cfa7a6a99ff1ca5e0e5d4..64e30effde5a7bd03443fe51ecbca5bba6b17487 100644
--- a/chrome/common/extensions/command.h
+++ b/chrome/common/extensions/command.h
@@ -26,7 +26,8 @@ class Command {
   Command();
   Command(const std::string& command_name,
           const string16& description,
-          const std::string& accelerator);
+          const std::string& accelerator,
+          bool global);
   ~Command();
 
   // The platform value for the Command.
@@ -56,6 +57,7 @@ class Command {
   const std::string& command_name() const { return command_name_; }
   const ui::Accelerator& accelerator() const { return accelerator_; }
   const string16& description() const { return description_; }
+  const bool global() const { return global_; }
 
   // Setter:
   void set_accelerator(ui::Accelerator accelerator) {
@@ -66,6 +68,7 @@ class Command {
   std::string command_name_;
   ui::Accelerator accelerator_;
   string16 description_;
+  bool global_;
 };
 
 // A mapping of command name (std::string) to a command object.