Addresses the spacing issue between close button and title in global error bubble from issue 449737.

Add an optional title icon in the BubbleFrameView and use the standard title/icon in the GlobalErrorBubbleView.

BUG=449737

Review URL: https://codereview.chromium.org/933893003

Cr-Commit-Position: refs/heads/master@{#317927}
8 files changed