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

chrome/browser/ui/views/frame/browser_view.cc

Index: chrome/browser/ui/views/frame/browser_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_view.cc b/chrome/browser/ui/views/frame/browser_view.cc
index 2884c46819f402a25a295470c55017ece695dc09..1029c74632cacf7e61d63f1add3dd3a7753c749c 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -176,6 +176,9 @@ const char* const kBrowserViewKey = "__BROWSER_VIEW__";
 // The number of milliseconds between loading animation frames.
 const int kLoadingAnimationFrameTimeMs = 30;
 
+// The size of the window icon in pixels.

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

Are these device-independent pixels? (ImageFamily works in DIPs)

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

Removed.

+const int kWindowIconSize = 32;

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

I wonder if this should be IconUtil::kMediumIconSize (48), which icon_util.cc
claims is the Alt+Tab icon size on line 155.
http://msdn.microsoft.com/en-us/library/aa511280.aspx#size suggests this is the
case too.

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

Done.

+
 // TODO(kuan): These functions are temporarily for the bookmark bar while its
 // detached state is at the top of the page;  it'll be moved to float on the
 // content page in the very near future, at which time, these local functions
@@ -1567,7 +1570,7 @@ gfx::ImageSkia BrowserView::GetWindowAppIcon() {
 
 gfx::ImageSkia BrowserView::GetWindowIcon() {
   if (browser_->is_app() || browser_->is_type_popup())
-    return browser_->GetCurrentPageIcon().AsImageSkia();
+    return browser_->GetCurrentPageIcon(kWindowIconSize).AsImageSkia();

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

Looks like c/b/ui/gtk/browser_titlebar.cc might use this too... but I guess ToT
is now linux_aura, so maybe you don't need to worry

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

Fixed it just in case.

   return gfx::ImageSkia();
 }