plugin_vm: enable line wrapping for installer's message

Bug: 1048962
Change-Id: I7db787ea4d42457507962d6e7b359405117015a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2035479
Commit-Queue: Julian Watson <juwa@google.com>
Commit-Queue: Timothy Loh <timloh@chromium.org>
Auto-Submit: Julian Watson <juwa@google.com>
Reviewed-by: Timothy Loh <timloh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738440}

chrome/browser/ui/views/plugin_vm/plugin_vm_installer_view.cc

@@ -128,7 +128,7 @@ PluginVmInstallerView::PluginVmInstallerView(Profile* profile)
   upper_container_view->AddChildView(message_container_view);
 
   message_label_ = new views::Label(GetMessage(), {kMessageFont});
-  message_label_->SetMultiLine(false);
+  message_label_->SetMultiLine(true);
   message_label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   message_container_view->AddChildView(message_label_);