Set Pointer/Hover types to None before PointerMediaQueriesDynamic test

On devices which already match the media requirements, the test fails as
handleMediaChange is never called. Instead, set the pointer and hover types to
None so that updating the types later is guaranteed to trigger the matchMedia
handler.

Bug: None
Change-Id: I8fa91ecef9c1f372d1b04abfbc540a7b9c0fc3c2
Reviewed-on: https://chromium-review.googlesource.com/951860Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541212}

content/browser/renderer_host/input/interaction_mq_dynamic_browsertest.cc

@@ -31,11 +31,16 @@ class InteractionMediaQueriesDynamicTest : public ContentBrowserTest {
     (defined(OS_ANDROID) && !defined(ADDRESS_SANITIZER))
 IN_PROC_BROWSER_TEST_F(InteractionMediaQueriesDynamicTest,
                        PointerMediaQueriesDynamic) {
+  RenderViewHost* rvh = shell()->web_contents()->GetRenderViewHost();
+  ui::SetAvailablePointerAndHoverTypesForTesting(ui::POINTER_TYPE_NONE,
+                                                 ui::HOVER_TYPE_NONE);
+  rvh->OnWebkitPreferencesChanged();
+
   GURL test_url = GetTestUrl("", "interaction-mq-dynamic.html");
   const base::string16 kSuccessTitle(base::ASCIIToUTF16("SUCCESS"));
   TitleWatcher title_watcher(shell()->web_contents(), kSuccessTitle);
   NavigateToURL(shell(), test_url);
-  RenderViewHost* rvh = shell()->web_contents()->GetRenderViewHost();
+
   ui::SetAvailablePointerAndHoverTypesForTesting(ui::POINTER_TYPE_COARSE,
                                                  ui::HOVER_TYPE_HOVER);
   rvh->OnWebkitPreferencesChanged();