Add missing fling_curve* entries to GN events targets.

This is so it matches with GYP version. This was reported by
http://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/12122/steps/gyp_flag_compare/logs/stdio

BUG=None
TEST=gn gen out_gn/Debug && ninja -C out_gn/Debug events_base
events_unittests
R=brettw@chromium.org
TBR=sky@chromium.org

Review URL: https://codereview.chromium.org/587533002

Cr-Commit-Position: refs/heads/master@{#295881}

ui/events/BUILD.gn

@@ -25,6 +25,8 @@ component("events_base") {
     "events_base_export.h",
     "gesture_event_details.cc",
     "gesture_event_details.h",
+    "gestures/fling_curve.cc",
+    "gestures/fling_curve.h",
     "gestures/gesture_configuration.cc",
     "gestures/gesture_configuration.h",
     "keycodes/keyboard_code_conversion.cc",
@@ -281,6 +283,7 @@ test("events_unittests") {
     "gesture_detection/motion_event_generic_unittest.cc",
     "gesture_detection/touch_disposition_gesture_filter_unittest.cc",
     "gesture_detection/velocity_tracker_unittest.cc",
+    "gestures/fling_curve_unittest.cc",
     "keycodes/dom4/keycode_converter_unittest.cc",
     "latency_info_unittest.cc",
     "platform/platform_event_source_unittest.cc",

ui/events/events.gyp

@@ -308,9 +308,6 @@
         'event_processor_unittest.cc',
         'event_rewriter_unittest.cc',
         'event_unittest.cc',
-        'gestures/fling_curve_unittest.cc',
-        'gestures/gesture_provider_aura_unittest.cc',
-        'gestures/motion_event_aura_unittest.cc',
         'gesture_detection/bitset_32_unittest.cc',
         'gesture_detection/gesture_event_data_packet_unittest.cc',
         'gesture_detection/gesture_provider_unittest.cc',
@@ -318,6 +315,9 @@
         'gesture_detection/motion_event_generic_unittest.cc',
         'gesture_detection/touch_disposition_gesture_filter_unittest.cc',
         'gesture_detection/velocity_tracker_unittest.cc',
+        'gestures/fling_curve_unittest.cc',
+        'gestures/gesture_provider_aura_unittest.cc',
+        'gestures/motion_event_aura_unittest.cc',
         'keycodes/dom4/keycode_converter_unittest.cc',
         'latency_info_unittest.cc',
         'platform/platform_event_source_unittest.cc',