X11 and Ozone: cleanup //content for use_x11 && use_ozone build.

Disables/enables tests for Ozone/Linux or non-Ozone/X11

-----

PS: Please note that this is a temp solution that will help to choose
between ozone and non-ozone X11 build. The switch that will be used
to choose the path is --enable-features=UseOzonePlatform. Once
non-Ozone X11 path is removed (hopefully by Q1 2021 depending on how
th finch trial goes), the wrapper will be removed.

Please also note that it's impossible to build use_x11 && use_ozone
without some hacks in PlatformCursor code. The changes to that are
on their way to upstream.

----

Bug: 1085700
Change-Id: I48797083cecf61929e10381d740590fc4584137d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315027
Commit-Queue: Maksim Sisov (GMT+3) <msisov@igalia.com>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791772}

content/browser/download/download_manager_impl_unittest.cc

@@ -47,6 +47,7 @@
 #include "content/public/test/test_browser_context.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/ui_base_features.h"
 #include "url/origin.h"
 
 using base::test::RunOnceCallback;
@@ -607,10 +608,16 @@ TEST_F(DownloadManagerTest, StartDownload) {
   EXPECT_CALL(GetMockDownloadManagerDelegate(), GetNextId_(_))
       .WillOnce(RunOnceCallback<0>(local_id));
 
-#if !defined(USE_X11)
-  // Doing nothing will set the default download directory to null.
-  EXPECT_CALL(GetMockDownloadManagerDelegate(), GetSaveDir(_, _, _));
+  // TODO(https://crbug.com/1109690): figure out what to do for Ozone/Linux.
+  // Probably, this can be removed.
+  bool should_call_get_save_dir = true;
+#if defined(USE_X11)
+  should_call_get_save_dir = features::IsUsingOzonePlatform();
 #endif
+  if (should_call_get_save_dir) {
+    // Doing nothing will set the default download directory to null.
+    EXPECT_CALL(GetMockDownloadManagerDelegate(), GetSaveDir(_, _, _));
+  }
   EXPECT_CALL(GetMockDownloadManagerDelegate(),
               ApplicationClientIdForFileScanning())
       .WillRepeatedly(Return("client-id"));
@@ -643,10 +650,16 @@ TEST_F(DownloadManagerTest, StartDownloadWithoutHistoryDB) {
   EXPECT_CALL(GetMockDownloadManagerDelegate(), GetNextId_(_))
       .WillOnce(RunOnceCallback<0>(download::DownloadItem::kInvalidId));
 
-#if !defined(USE_X11)
-  // Doing nothing will set the default download directory to null.
-  EXPECT_CALL(GetMockDownloadManagerDelegate(), GetSaveDir(_, _, _));
+  // TODO(https://crbug.com/1109690): figure out what to do for Ozone/Linux.
+  // Probably, this can be removed.
+  bool should_call_get_save_dir = true;
+#if defined(USE_X11)
+  should_call_get_save_dir = features::IsUsingOzonePlatform();
 #endif
+  if (should_call_get_save_dir) {
+    // Doing nothing will set the default download directory to null.
+    EXPECT_CALL(GetMockDownloadManagerDelegate(), GetSaveDir(_, _, _));
+  }
   EXPECT_CALL(GetMockDownloadManagerDelegate(),
               ApplicationClientIdForFileScanning())
       .WillRepeatedly(Return("client-id"));

content/browser/web_contents/web_contents_view_aura_unittest.cc

@@ -189,6 +189,7 @@ TEST_F(WebContentsViewAuraTest, WebContentsDestroyedDuringClick) {
 #if defined(USE_X11)
   // The web-content is not activated during mouse-press on X11.
   // See comment in WebContentsViewAura::OnMouseEvent() for more details.
+  // TODO(https://crbug.com/1109695): enable for Ozone/Linux.
   if (!features::IsUsingOzonePlatform()) {
     EXPECT_NE(web_contents(), nullptr);
   } else
@@ -317,6 +318,10 @@ TEST_F(WebContentsViewAuraTest, DragDropFiles) {
 
 #if defined(OS_WIN) || defined(USE_X11)
 TEST_F(WebContentsViewAuraTest, DragDropFilesOriginateFromRenderer) {
+#if defined(USE_X11)
+  if (features::IsUsingOzonePlatform())
+    return;
+#endif
   WebContentsViewAura* view = GetView();
   auto data = std::make_unique<ui::OSExchangeData>();