Pass MotionEvent tilt angles to Blink on Android.

content/browser/renderer_host/input/motion_event_web.h

Index: content/browser/renderer_host/input/motion_event_web.h
diff --git a/content/browser/renderer_host/input/motion_event_web.h b/content/browser/renderer_host/input/motion_event_web.h
index 34e954168b8baa6783685dc5970a19331ff13a06..1aac8554ec5c3da9497bf930daae6d88b29958d4 100644
--- a/content/browser/renderer_host/input/motion_event_web.h
+++ b/content/browser/renderer_host/input/motion_event_web.h
@@ -5,13 +5,14 @@
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_MOTION_EVENT_WEB_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_MOTION_EVENT_WEB_H_
 
+#include "content/common/content_export.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/events/gesture_detection/motion_event.h"
 
 namespace content {
 
 // Implementation of ui::MotionEvent wrapping a WebTouchEvent.
-class MotionEventWeb : public ui::MotionEvent {
+class CONTENT_EXPORT MotionEventWeb : public ui::MotionEvent {
  public:
   explicit MotionEventWeb(const blink::WebTouchEvent& event);
   ~MotionEventWeb() override;
@@ -30,6 +31,7 @@ class MotionEventWeb : public ui::MotionEvent {
   float GetTouchMinor(size_t pointer_index) const override;
   float GetOrientation(size_t pointer_index) const override;
   float GetPressure(size_t pointer_index) const override;
+  float GetTilt(size_t pointer_index) const override;
   base::TimeTicks GetEventTime() const override;
   ToolType GetToolType(size_t pointer_index) const override;
   int GetButtonState() const override;