[vr] Fix splash screen icon position

Bug: 740259
Change-Id: Ida1bcb3796359b09bed88143f339fae3c00edda1
Reviewed-on: https://chromium-review.googlesource.com/571946Reviewed-by: Biao She <bshe@chromium.org>
Commit-Queue: Yash Malik <ymalik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487096}

chrome/browser/vr/ui_scene_manager.cc

@@ -102,7 +102,7 @@ static constexpr float kSplashScreenIconHeight =
 static constexpr float kSplashScreenIconWidth =
     kSplashScreenIconDMM * kSplashScreenDistance;
 static constexpr float kSplashScreenIconVerticalOffset =
-    0.2 * kSplashScreenDistance;
+    -0.1 * kSplashScreenDistance;
 
 static constexpr float kCloseButtonDistance = 2.4;
 static constexpr float kCloseButtonHeight =