Plumb gesture source value through Blink.

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

Index: third_party/WebKit/Source/web/tests/WebFrameTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
index 6ccabebaf585749882754bfb8139c8719d6095a9..064515182c934f42cde6f6ceecbba5349286904a 100644
--- a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
@@ -1601,7 +1601,7 @@ TEST_F(WebFrameTest, SetForceZeroLayoutHeightWorksWithRelayoutsWhenHeightChanged
     ASSERT_NE(nullptr, element);
     EXPECT_EQ(String("oldValue"), element->innerText());
 
-    PlatformGestureEvent gestureEvent(PlatformEvent::Type::GestureTap, hitPoint, hitPoint, IntSize(0, 0), 0, PlatformEvent::NoModifiers);
+    PlatformGestureEvent gestureEvent(PlatformEvent::Type::GestureTap, hitPoint, hitPoint, IntSize(0, 0), 0, PlatformEvent::NoModifiers, PlatformGestureSourceTouchpad);
     webViewHelper.webViewImpl()->mainFrameImpl()->frame()->eventHandler().handleGestureEvent(gestureEvent);
     // when pressed, the button changes its own text to "updatedValue"
     EXPECT_EQ(String("updatedValue"), element->innerText());
@@ -4759,6 +4759,7 @@ static WebGestureEvent fatTap(int x, int y)
 {
     WebGestureEvent event;
     event.type = WebInputEvent::GestureTap;
+    event.sourceDevice = WebGestureDeviceTouchpad;
     event.x = x;
     event.y = y;
     event.data.tap.width = 50;
@@ -7956,6 +7957,7 @@ protected:
     {
         WebGestureEvent event;
         event.type = type;
+        event.sourceDevice = WebGestureDeviceTouchpad;
         event.x = 100;
         event.y = 100;
         if (type == WebInputEvent::GestureScrollUpdate) {