Improve large tab strip by leveraging touch icons when present

chrome/browser/ui/touch/tabs/touch_tab.h

Index: chrome/browser/ui/touch/tabs/touch_tab.h
diff --git a/chrome/browser/ui/touch/tabs/touch_tab.h b/chrome/browser/ui/touch/tabs/touch_tab.h
index b4ff409ed756abae2066c2952e6425e6a214d2d6..06f7096b1b826cae453f2b05d972f2dbada9db0b 100644
--- a/chrome/browser/ui/touch/tabs/touch_tab.h
+++ b/chrome/browser/ui/touch/tabs/touch_tab.h
@@ -12,6 +12,9 @@
 #include "chrome/browser/ui/views/tabs/base_tab.h"
 #include "ui/gfx/point.h"
 
+// The size of the favicon touch area.
+const int kTouchTargetIconSize = 32;
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 // TouchTab
@@ -34,6 +37,14 @@ class TouchTab : public BaseTab {
     background_offset_ = offset;
   }
 
+  // get and set touch icon
+  void set_touch_icon(const SkBitmap& bitmap) {
+    touch_icon_ = bitmap;
+  }
+  const SkBitmap& touch_icon() const {
+    return touch_icon_;
+  }
+
   // Returns the minimum possible size of a single unselected Tab.
   static gfx::Size GetMinimumUnselectedSize();
 
@@ -74,6 +85,9 @@ class TouchTab : public BaseTab {
   // The offset used to paint the inactive background image.
   gfx::Point background_offset_;
 
+  // The touch icon found
+  SkBitmap touch_icon_;
+
   // 'l' is for left
   // 'c' is for center
   // 'r' is for right