Divide gesture events by dpi scale if IsDIPEnabled().

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index 662ac0fb98b8c4d13a22d25a5c57ac6d48935209..7bc8378aa0938906a414803b8b7fa090deece280 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -230,9 +230,9 @@ class ContentViewCoreImpl : public ContentViewCore,
 
   int GetTouchPadding();
 
-  void SendGestureEvent(WebKit::WebInputEvent::Type type, long time_ms,
-                        int x, int y);
-
+  float DpiScale() const;
+  WebKit::WebGestureEvent MakeGestureEvent(WebKit::WebInputEvent::Type type,
+                                           long time_ms, int x, int y) const;
   struct JavaObject;
   JavaObject* java_object_;
 
@@ -248,6 +248,8 @@ class ContentViewCoreImpl : public ContentViewCore,
   // Whether the renderer backing this ContentViewCore has crashed.
   bool tab_crashed_;
 
+  float dpi_scale_;
+
   // The owning window that has a hold of main application activity.
   ui::WindowAndroid* window_android_;