Added UMA stat for tracking accidental navigations on double tap.

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 4d304d15dc2d055ca4fc34d99f8e156710a5e1df..d4bdc933299990f050252e2aa87a17d54bc12817 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -223,6 +223,12 @@ class ContentViewCoreImpl : public ContentViewCore,
                                   jobject jsurface);
   void DetachExternalVideoSurface(JNIEnv* env, jobject obj, jint player_id);
   void SetAccessibilityEnabled(JNIEnv* env, jobject obj, bool enabled);
+  void SendActionAfterDoubleTapUma(JNIEnv* env,
+                                   jobject obj,
+                                   jint type,
+                                   jboolean has_delay,
+                                   jint count);
+  void SendSingleTapUma(JNIEnv* env, jobject obj, jint type, jint count);
 
   // --------------------------------------------------------------------------
   // Public methods that call to Java via JNI