Update avatar button to MD (part 1)

chrome/browser/ui/views/frame/glass_browser_frame_view.h

Index: chrome/browser/ui/views/frame/glass_browser_frame_view.h
diff --git a/chrome/browser/ui/views/frame/glass_browser_frame_view.h b/chrome/browser/ui/views/frame/glass_browser_frame_view.h
index 8b0ad07cd6475aa4dbbeb5512a5421fd3060b860..e438cf01917dc386e4be624899196b8551de61b3 100644
--- a/chrome/browser/ui/views/frame/glass_browser_frame_view.h
+++ b/chrome/browser/ui/views/frame/glass_browser_frame_view.h
@@ -7,20 +7,24 @@
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/scoped_observer.h"
 #include "base/win/scoped_gdi_object.h"
 #include "chrome/browser/ui/views/frame/avatar_button_manager.h"
 #include "chrome/browser/ui/views/frame/browser_non_client_frame_view.h"
 #include "chrome/browser/ui/views/frame/windows_10_caption_button.h"
 #include "chrome/browser/ui/views/tab_icon_view.h"
 #include "chrome/browser/ui/views/tab_icon_view_model.h"
+#include "chrome/browser/ui/views/tabs/tab_strip_observer.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/window/non_client_view.h"
 
 class BrowserView;
+class TabStrip;
 
 class GlassBrowserFrameView : public BrowserNonClientFrameView,
                               public views::ButtonListener,
-                              public TabIconViewModel {
+                              public TabIconViewModel,
+                              public TabStripObserver {
  public:
   // Constructs a non-client view for an BrowserFrame.
   GlassBrowserFrameView(BrowserFrame* frame, BrowserView* browser_view);
@@ -33,6 +37,7 @@ class GlassBrowserFrameView : public BrowserNonClientFrameView,
   void UpdateThrobber(bool running) override;
   gfx::Size GetMinimumSize() const override;
   views::View* GetProfileSwitcherView() const override;
+  void OnBrowserViewInitViewsComplete() override;
 
   // views::NonClientFrameView:
   gfx::Rect GetBoundsForClientView() const override;
@@ -52,6 +57,11 @@ class GlassBrowserFrameView : public BrowserNonClientFrameView,
   bool ShouldTabIconViewAnimate() const override;
   gfx::ImageSkia GetFaviconForTabIconView() override;
 
+  // TabStripObserver:
+  void TabStripMaxXChanged(TabStrip* tab_strip) override;
+  void TabStripDeleted(TabStrip* tab_strip) override;
+  void TabStripRemovedTabAt(TabStrip* tab_strip, int index) override;
+
   bool IsMaximized() const;
 
   // Visual height of the titlebar when the window is maximized (i.e. excluding
@@ -64,6 +74,7 @@ class GlassBrowserFrameView : public BrowserNonClientFrameView,
   // views::View:
   void OnPaint(gfx::Canvas* canvas) override;
   void Layout() override;
+  void ChildPreferredSizeChanged(views::View* child) override;
 
   // BrowserNonClientFrameView:
   void UpdateProfileIcons() override;
@@ -189,6 +200,10 @@ class GlassBrowserFrameView : public BrowserNonClientFrameView,
   // The index of the current frame of the throbber animation.
   int throbber_frame_;
 
+  // The window's tabstrip, if any, is observed so we know when to resize any
+  // avatar button.
+  ScopedObserver<TabStrip, GlassBrowserFrameView> tab_strip_observer_;
+
   static const int kThrobberIconCount = 24;
   static HICON throbber_icons_[kThrobberIconCount];
   static void InitThrobberIcons();