Never show the close(x) icon on content setting bubbles.

Bug: 652024
Change-Id: I77bfbe29d728e3f3f8bdc0d7d2b1f728d8da969b
Reviewed-on: https://chromium-review.googlesource.com/740085Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Allen Bauer <kylixrd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512603}

chrome/browser/ui/views/content_setting_bubble_contents.cc

@@ -357,7 +357,7 @@ base::string16 ContentSettingBubbleContents::GetWindowTitle() const {
 }
 
 bool ContentSettingBubbleContents::ShouldShowCloseButton() const {
-  return ChromeLayoutProvider::Get()->IsHarmonyMode();
+  return false;
 }
 
 void ContentSettingBubbleContents::Init() {