Move a bunch of ash-only vector icons to ash/.

ash/common/system/chromeos/palette/common_palette_tool.h

Index: ash/common/system/chromeos/palette/common_palette_tool.h
diff --git a/ash/common/system/chromeos/palette/common_palette_tool.h b/ash/common/system/chromeos/palette/common_palette_tool.h
index 67ef66fc23c22482f24e64bf1702f2db047dcab5..2cefaffaf64b35e652d485b8c454b0cd3fa4c3a7 100644
--- a/ash/common/system/chromeos/palette/common_palette_tool.h
+++ b/ash/common/system/chromeos/palette/common_palette_tool.h
@@ -6,13 +6,17 @@
 #define ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_COMMON_PALETTE_TOOL_H_
 
 #include "ash/common/system/chromeos/palette/palette_tool.h"
-#include "ash/common/system/tray/hover_highlight_view.h"
 #include "ash/common/system/tray/view_click_listener.h"
 #include "base/strings/string16.h"
-#include "ui/gfx/vector_icons_public.h"
+
+namespace gfx {
+struct VectorIcon;
+}
 
 namespace ash {
 
+class HoverHighlightView;
+
 // A PaletteTool implementation with a standard view support.
 class CommonPaletteTool : public PaletteTool, public ash::ViewClickListener {
  protected:
@@ -30,7 +34,7 @@ class CommonPaletteTool : public PaletteTool, public ash::ViewClickListener {
 
   // Returns the icon used in the palette tray on the left-most edge of the
   // tool.
-  virtual gfx::VectorIconId GetPaletteIconId() = 0;
+  virtual const gfx::VectorIcon& GetPaletteIcon() const = 0;
 
   // Creates a default view implementation to be returned by CreateView.
   views::View* CreateDefaultView(const base::string16& name);