Fix warning for GestureEventQueueWithSourceTest

This CL removes the uninstantiated test suite
GestureEventQueueWithSourceTest to fix the warning in content_unittests:
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<GestureEventQueueWithSourceTest>

Bug: 1045846
Change-Id: I82146898d77e36240b0e26a0dcf551228435cf35
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2143874
Commit-Queue: Alan Cutter <alancutter@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758098}

content/browser/renderer_host/input/gesture_event_queue_unittest.cc

@@ -242,11 +242,6 @@ class GestureEventQueueTest : public testing::Test,
 #endif
 };
 
-// This is for tests that are to be run for all source devices.
-class GestureEventQueueWithSourceTest
-    : public GestureEventQueueTest,
-      public testing::WithParamInterface<WebGestureDevice> {};
-
 class GestureEventQueueWithCompositorEventQueueTest
     : public GestureEventQueueTest {};
 
@@ -280,11 +275,6 @@ TEST_F(GestureEventQueueTest, SyncAckQueuesEvent) {
   EXPECT_EQ(1U, GetAndResetAckedGestureEventCount());
 }
 
-INSTANTIATE_TEST_SUITE_P(AllSources,
-                         GestureEventQueueWithSourceTest,
-                         testing::Values(blink::WebGestureDevice::kTouchscreen,
-                                         blink::WebGestureDevice::kTouchpad));
-
 // Test that a GestureScrollEnd is deferred during the debounce interval,
 // that Scrolls are not and that the deferred events are sent after that
 // timer fires.