Use high resolution icons where possible for streamlined hosted app icons.

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index 7f851351abc0f36fe118305b0567dc71a551a7f1..9fd9cc92380b0b973bee8ff339a0d653018ce2ff 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -29,6 +29,7 @@
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/ui/toolbar/toolbar_model.h"
+#include "chrome/browser/ui/web_applications/hosted_app_tab_helper_delegate.h"
 #include "chrome/browser/ui/zoom/zoom_observer.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_types.h"
@@ -99,6 +100,7 @@ class Browser : public TabStripModelObserver,
                 public SearchEngineTabHelperDelegate,
                 public ChromeWebModalDialogManagerDelegate,
                 public BookmarkTabHelperDelegate,
+                public HostedAppTabHelperDelegate,
                 public ZoomObserver,
                 public content::PageNavigator,
                 public content::NotificationObserver,
@@ -282,7 +284,7 @@ class Browser : public TabStripModelObserver,
   // State Storage and Retrieval for UI ///////////////////////////////////////
 
   // Gets the Favicon of the page in the selected tab.
-  gfx::Image GetCurrentPageIcon() const;
+  const gfx::Image GetCurrentPageIcon(int icon_size) const;

[tapted, 2013/11/11 08:52:57]

nit: non-reference `const` return types aren't usually useful, it just
encourages more copying if someone wants a non-const version, even though it's
the "only" copy.

and `dimension` might be a better name than |icon_size| (a foo_size is more
often size in bytes when it's just an int), but it also needs some
documentation. E.g. Gets the best Favicon of the page in the selected tab to fit
in a square of |dimension| width in pixels.

[calamity, 2013/11/13 06:37:14]

Done.

 
   // Gets the title of the window based on the selected tab's title.
   string16 GetWindowTitleForCurrentTab() const;
@@ -679,6 +681,9 @@ class Browser : public TabStripModelObserver,
   virtual void URLStarredChanged(content::WebContents* web_contents,
                                  bool starred) OVERRIDE;
 
+  // Overriden from HostedAppTabHelper:
+  virtual void OnWindowIconLoaded(content::WebContents* source) OVERRIDE;
+
   // Overridden from ZoomObserver:
   virtual void OnZoomChanged(content::WebContents* source,
                              bool can_show_bubble) OVERRIDE;