WIP

components/exo/shell_surface.h

Index: components/exo/shell_surface.h
diff --git a/components/exo/shell_surface.h b/components/exo/shell_surface.h
index 7443e48dc2d7696b23b2286d1a0335ac14381626..779b293278352288bacb3471b12cbe146088c491 100644
--- a/components/exo/shell_surface.h
+++ b/components/exo/shell_surface.h
@@ -144,6 +144,12 @@ class ShellSurface : public SurfaceDelegate,
   // Set title for surface.
   void SetTitle(const base::string16& title);
 
+  // Set chunk of surface icon.
+  void SetIconChunk(uint32_t flags, const std::string& unsafe_icon_png);
+
+  // Reset icon for surface.
+  void ResetIcon();
+
   // Sets the system modality.
   void SetSystemModal(bool system_modal);
 
@@ -213,6 +219,18 @@ class ShellSurface : public SurfaceDelegate,
   // |window| must not be nullptr.
   static Surface* GetMainSurface(const aura::Window* window);
 
+  // Returns true if |key| defines property that contains compressed png icon
+  // for a window.
+  static bool IsUnsafeIconPngDataKey(const void* key);
+
+  // Returns custom icon for the window in compressed png format. This data must
+  // be decoded in chrome/browser context using IPC ImageDecoder.
+  static const std::string* GetUnsafeIconPngData(const aura::Window* window);
+
+  // Sets custom icon for the window in compressed png format.
+  static void SetUnsafeIconPngData(aura::Window* window,
+                                   std::string* unsage_icon_png_data);
+
   // Returns a trace value representing the state of the surface.
   std::unique_ptr<base::trace_event::TracedValue> AsTracedValue() const;
 
@@ -349,6 +367,8 @@ class ShellSurface : public SurfaceDelegate,
   bool shadow_enabled_ = false;
   bool pending_show_widget_ = false;
   base::string16 title_;
+  std::string unsafe_icon_png_;
+  std::string unsafe_icon_png_builder_;
   std::string application_id_;
   gfx::Rect geometry_;
   gfx::Rect pending_geometry_;