Updating Gamepad API to match latest spec

content/browser/gamepad/gamepad_standard_mappings.h

Index: content/browser/gamepad/gamepad_standard_mappings.h
diff --git a/content/browser/gamepad/gamepad_standard_mappings.h b/content/browser/gamepad/gamepad_standard_mappings.h
index 6b533ca5829c01139e70ac73145613772e14c766..7c2c10c20357e41a2cc8cc0ad69ab71ae4ec4154 100644
--- a/content/browser/gamepad/gamepad_standard_mappings.h
+++ b/content/browser/gamepad/gamepad_standard_mappings.h
@@ -6,10 +6,7 @@
 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_
 
 #include "base/strings/string_piece.h"
-
-namespace blink {
-class WebGamepad;
-}
+#include "content/common/gamepad_hardware_buffer.h"
 
 namespace content {
 
@@ -56,6 +53,15 @@ enum CanonicalAxisIndex {
   kNumAxes
 };
 
+// Matches XInput's trigger deadzone
+const float kDefaultButtonPressedThreshold = 30.f/255.f;
+
+// Common mapping functions
+blink::WebGamepadButton AxisToButton(float input);
+blink::WebGamepadButton AxisNegativeAsButton(float input);
+blink::WebGamepadButton AxisPositiveAsButton(float input);
+void DpadFromAxis(blink::WebGamepad* mapped, float dir);
+
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_