For some vector icons, get the size from the vector definition.

chrome/browser/ui/views/tabs/tab.cc

Index: chrome/browser/ui/views/tabs/tab.cc
diff --git a/chrome/browser/ui/views/tabs/tab.cc b/chrome/browser/ui/views/tabs/tab.cc
index 6df01e27b9814d564359ce6c8ec0fe113a9aa4ed..6969e662ac743974df6d231a2c57c04271a6d6d6 100644
--- a/chrome/browser/ui/views/tabs/tab.cc
+++ b/chrome/browser/ui/views/tabs/tab.cc
@@ -132,7 +132,6 @@ const double kImmersiveTabMinThrobOpacity = 0.66;
 const int kImmersiveLoadingStepCount = 32;
 
 const char kTabCloseButtonName[] = "TabCloseButton";
-const int kTabCloseButtonSize = 16;
 
 chrome::HostDesktopType GetHostDesktopType(views::View* view) {
   // Widget is NULL when tabs are detached.
@@ -409,12 +408,12 @@ Tab::Tab(TabController* controller)
   // The normal image is set by OnButtonColorMaybeChanged() because it depends
   // on the current theme and active state.  The hovered and pressed images
   // don't depend on the these, so we can set them here.
-  const gfx::ImageSkia& hovered = gfx::CreateVectorIcon(
-      gfx::VectorIconId::TAB_CLOSE_HOVERED_PRESSED, kTabCloseButtonSize,
-      SkColorSetARGB(0xFF, 0xDB, 0x44, 0x37));
-  const gfx::ImageSkia& pressed = gfx::CreateVectorIcon(
-      gfx::VectorIconId::TAB_CLOSE_HOVERED_PRESSED, kTabCloseButtonSize,
-      SkColorSetARGB(0xFF, 0xA8, 0x35, 0x2A));
+  const gfx::ImageSkia& hovered =
+      gfx::CreatePrimaryVectorIcon(gfx::VectorIconId::TAB_CLOSE_HOVERED_PRESSED,
+                                   SkColorSetARGB(0xFF, 0xDB, 0x44, 0x37));
+  const gfx::ImageSkia& pressed =
+      gfx::CreatePrimaryVectorIcon(gfx::VectorIconId::TAB_CLOSE_HOVERED_PRESSED,
+                                   SkColorSetARGB(0xFF, 0xA8, 0x35, 0x2A));
   close_button_->SetImage(views::CustomButton::STATE_HOVERED, &hovered);
   close_button_->SetImage(views::CustomButton::STATE_PRESSED, &pressed);
 
@@ -1501,9 +1500,9 @@ void Tab::OnButtonColorMaybeChanged() {
     button_color_ = new_button_color;
     title_->SetEnabledColor(title_color);
     media_indicator_button_->OnParentTabButtonColorChanged();
-    const gfx::ImageSkia& close_button_normal_image = gfx::CreateVectorIcon(
-        gfx::VectorIconId::TAB_CLOSE_NORMAL, kTabCloseButtonSize,
-        button_color_);
+    const gfx::ImageSkia& close_button_normal_image =
+        gfx::CreatePrimaryVectorIcon(gfx::VectorIconId::TAB_CLOSE_NORMAL,
+                                     button_color_);
     close_button_->SetImage(views::CustomButton::STATE_NORMAL,
                             &close_button_normal_image);
   }