[MD] replace infobar bottom solid line separator with a shadow.

chrome/browser/ui/views/infobars/infobar_container_view.h

Index: chrome/browser/ui/views/infobars/infobar_container_view.h
diff --git a/chrome/browser/ui/views/infobars/infobar_container_view.h b/chrome/browser/ui/views/infobars/infobar_container_view.h
index c2e99601bf2b11ae7fb19ace87a6c8fc89a9aa5f..31e8f4bd9c84fb6719580cd025f0028fb45c9fb7 100644
--- a/chrome/browser/ui/views/infobars/infobar_container_view.h
+++ b/chrome/browser/ui/views/infobars/infobar_container_view.h
@@ -14,15 +14,13 @@
 
 // The views-specific implementation of InfoBarContainer.
 class InfoBarContainerView : public views::AccessiblePaneView,
-                             public infobars::InfoBarContainer,
-                             public views::ViewTargeterDelegate {
+                             public infobars::InfoBarContainer {
  public:
   static const char kViewClassName[];
 
   explicit InfoBarContainerView(Delegate* delegate);
   ~InfoBarContainerView() override;
 
- private:
   // AccessiblePaneView:
   gfx::Size GetPreferredSize() const override;
   const char* GetClassName() const override;
@@ -33,10 +31,12 @@ class InfoBarContainerView : public views::AccessiblePaneView,
   void PlatformSpecificAddInfoBar(infobars::InfoBar* infobar,
                                   size_t position) override;
   void PlatformSpecificRemoveInfoBar(infobars::InfoBar* infobar) override;
+  void PlatformSpecificInfoBarStateChanged(bool is_animating) override;
 
-  // ViewTargeterDelegate:
-  bool DoesIntersectRect(const View* target,
-                         const gfx::Rect& rect) const override;
+ private:
+  // This view draws the shadow over the web contents below the
+  // lowest infobar.
+  views::View* content_shadow_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarContainerView);
 };