Implement GetClassName() for CustomTabBarView

This CL updates CustomTabBarView to report its class name to native
UI devtools.

Bug: 853593
Change-Id: I9b56a2138ef08d54a604f67fa5dd7eaf8e9b19b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888851
Auto-Submit: Alan Cutter <alancutter@chromium.org>
Reviewed-by: Jay Harris <harrisjay@chromium.org>
Commit-Queue: Jay Harris <harrisjay@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710591}

chrome/browser/ui/views/location_bar/custom_tab_bar_view.cc

@@ -233,6 +233,10 @@ gfx::Rect CustomTabBarView::GetAnchorBoundsInScreen() const {
                          title_origin_view_->GetAnchorBoundsInScreen());
 }
 
+const char* CustomTabBarView::GetClassName() const {
+  return kViewClassName;
+}
+
 void CustomTabBarView::TabChangedAt(content::WebContents* contents,
                                     int index,
                                     TabChangeType change_type) {

chrome/browser/ui/views/location_bar/custom_tab_bar_view.h

@@ -48,6 +48,7 @@ class CustomTabBarView : public views::AccessiblePaneView,
 
   // views::View:
   gfx::Rect GetAnchorBoundsInScreen() const override;
+  const char* GetClassName() const override;
 
   // TabstripModelObserver:
   void TabChangedAt(content::WebContents* contents,