Correct behaviour of touch wrt mouse capture.

base/win/win_util.h

Index: base/win/win_util.h
diff --git a/base/win/win_util.h b/base/win/win_util.h
index 09c66cd0f7174a14abbfdc7278d56403ff6fe58f..9abc728420df893f5e17838fe7c1d469cc8f604b 100644
--- a/base/win/win_util.h
+++ b/base/win/win_util.h
@@ -58,6 +58,10 @@ BASE_EXPORT bool IsCtrlPressed();
 // Returns true if the alt key is currently pressed.
 BASE_EXPORT bool IsAltPressed();
 
+// Returns true if |message| identifies a mouse event that was generated as the
+// result of a touch event.
+BASE_EXPORT bool IsMouseEventFromTouch(UINT message);
+
 // Returns false if user account control (UAC) has been disabled with the
 // EnableLUA registry flag. Returns true if user account control is enabled.
 // NOTE: The EnableLUA registry flag, which is ignored on Windows XP