Force events to be non blocking if main thread is unresponsive.

content/renderer/render_widget_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_widget.h"
 
 #include <tuple>
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 11 matching lines @@
 #include "ui/gfx/geometry/rect.h"
 
 using testing::_;
 
 namespace content {
 
 namespace {
 
 const char* EVENT_LISTENER_RESULT_HISTOGRAM = "Event.PassiveListeners";
 
+// Keep in sync with enum defined in
+// RenderWidgetInputHandler::LogPassiveEventListenersUma.
 enum {
   PASSIVE_LISTENER_UMA_ENUM_PASSIVE,
   PASSIVE_LISTENER_UMA_ENUM_UNCANCELABLE,
   PASSIVE_LISTENER_UMA_ENUM_SUPPRESSED,
   PASSIVE_LISTENER_UMA_ENUM_CANCELABLE,
   PASSIVE_LISTENER_UMA_ENUM_CANCELABLE_AND_CANCELED,
   PASSIVE_LISTENER_UMA_ENUM_FORCED_NON_BLOCKING_DUE_TO_FLING,
+  PASSIVE_LISTENER_UMA_ENUM_FORCED_NON_BLOCKING_DUE_TO_MAIN_THREAD_RESPONSIVENESS,
   PASSIVE_LISTENER_UMA_ENUM_COUNT
 };
 
 class MockWebWidget : public blink::WebWidget {
  public:
   MOCK_METHOD1(handleInputEvent,
                blink::WebInputEventResult(const blink::WebInputEvent&));
 };
 
 }  // namespace
@@ skipping 228 matching lines @@
   EXPECT_EQ(gfx::Vector2dF(-10, -5), overscroll.current_fling_velocity);
   widget()->sink()->ClearMessages();
 }
 
 TEST_F(RenderWidgetUnittest, RenderWidgetInputEventUmaMetrics) {
   SyntheticWebTouchEvent touch;
   touch.PressPoint(10, 10);
   touch.touchStartOrFirstTouchMove = true;
 
   EXPECT_CALL(*widget()->mock_webwidget(), handleInputEvent(_))
-      .Times(5)
+      .Times(7)
       .WillRepeatedly(
           ::testing::Return(blink::WebInputEventResult::NotHandled));
 
   widget()->SendInputEvent(touch);
   histogram_tester().ExpectBucketCount(EVENT_LISTENER_RESULT_HISTOGRAM,
                                        PASSIVE_LISTENER_UMA_ENUM_CANCELABLE, 1);
 
   touch.dispatchType = blink::WebInputEvent::DispatchType::EventNonBlocking;
   widget()->SendInputEvent(touch);
   histogram_tester().ExpectBucketCount(EVENT_LISTENER_RESULT_HISTOGRAM,
@@ skipping 15 matching lines @@
 
   touch.MovePoint(0, 10, 10);
   touch.touchStartOrFirstTouchMove = true;
   touch.dispatchType =
       blink::WebInputEvent::DispatchType::ListenersForcedNonBlockingDueToFling;
   widget()->SendInputEvent(touch);
   histogram_tester().ExpectBucketCount(
       EVENT_LISTENER_RESULT_HISTOGRAM,
       PASSIVE_LISTENER_UMA_ENUM_FORCED_NON_BLOCKING_DUE_TO_FLING, 2);
 
+  touch.dispatchType = blink::WebInputEvent::DispatchType::
+      ListenersForcedNonBlockingDueToMainThreadResponsiveness;
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(
+      EVENT_LISTENER_RESULT_HISTOGRAM,
+      PASSIVE_LISTENER_UMA_ENUM_FORCED_NON_BLOCKING_DUE_TO_MAIN_THREAD_RESPONSIVENESS,
+      1);
+
+  touch.MovePoint(0, 10, 10);
+  touch.touchStartOrFirstTouchMove = true;
+  touch.dispatchType = blink::WebInputEvent::DispatchType::
+      ListenersForcedNonBlockingDueToMainThreadResponsiveness;
+  widget()->SendInputEvent(touch);
+  histogram_tester().ExpectBucketCount(
+      EVENT_LISTENER_RESULT_HISTOGRAM,
+      PASSIVE_LISTENER_UMA_ENUM_FORCED_NON_BLOCKING_DUE_TO_MAIN_THREAD_RESPONSIVENESS,
+      2);
+
   EXPECT_CALL(*widget()->mock_webwidget(), handleInputEvent(_))
       .WillOnce(
           ::testing::Return(blink::WebInputEventResult::HandledSuppressed));
   touch.dispatchType = blink::WebInputEvent::DispatchType::Blocking;
   widget()->SendInputEvent(touch);
   histogram_tester().ExpectBucketCount(EVENT_LISTENER_RESULT_HISTOGRAM,
                                        PASSIVE_LISTENER_UMA_ENUM_SUPPRESSED, 1);
 
   EXPECT_CALL(*widget()->mock_webwidget(), handleInputEvent(_))
       .WillOnce(
@@ skipping 27 matching lines @@
                                       2);
 
   touch.MovePoint(0, 30, 30);
   touch.touchStartOrFirstTouchMove = false;
   widget()->SendInputEvent(touch);
   histogram_tester().ExpectTotalCount("Event.Touch.TouchLatencyOutsideFling",
                                       2);
 }
 
 }  // namespace content