Implement forwarding of search queries for metro mode

base/win/metro.h

Index: base/win/metro.h
===================================================================
--- base/win/metro.h	(revision 151723)
+++ base/win/metro.h	(working copy)
@@ -16,12 +16,13 @@
 
 // Identifies the type of the metro launch.
 enum MetroLaunchType {
-  LAUNCH,
-  SEARCH,
-  SHARE,
-  FILE,
-  PROTOCOL,
-  LASTLAUNCHTYPE,
+  METRO_LAUNCH,
+  METRO_SEARCH,
+  METRO_SHARE,
+  METRO_FILE,
+  METRO_PROTOCOL,
+  METRO_LAUNCH_ERROR,
+  METRO_LASTLAUNCHTYPE,
 };
 
 // In metro mode, this enum identifies the last execution state, i.e. whether
@@ -71,6 +72,10 @@
 // This function should ideally be called on the UI thread.
 BASE_EXPORT bool IsParentalControlActivityLoggingOn();
 
+// Returns the type of launch and the activation params. For example if the
+// the launch is for METRO_PROTOCOL then the params is a url.
+MetroLaunchType GetMetroLaunchParams(string16* params);
+
 // Handler function for the buttons on a metro dialog box
 typedef void (*MetroDialogButtonPressedHandler)();