Convert resources to take an instance key instead of an Instance*.

ppapi/cpp/private/flash.h

Index: ppapi/cpp/private/flash.h
diff --git a/ppapi/cpp/private/flash.h b/ppapi/cpp/private/flash.h
index e60cc013a74dd96bebdd07f73009a839fe6b68a5..9eafac384dfe9a5530800d8b2a31251b07e6b663 100644
--- a/ppapi/cpp/private/flash.h
+++ b/ppapi/cpp/private/flash.h
@@ -16,7 +16,7 @@ namespace pp {
 
 class FontDescription_Dev;
 class ImageData;
-class Instance;
+class InstanceHandle;
 class Module;
 class Point;
 class Rect;
@@ -30,8 +30,9 @@ class Flash {
   // Returns true if the required interface is available.
   static bool IsAvailable();
 
-  static void SetInstanceAlwaysOnTop(Instance* instance, bool on_top);
-  static bool DrawGlyphs(Instance* instance,
+  static void SetInstanceAlwaysOnTop(const InstanceHandle& instance,
+                                     bool on_top);
+  static bool DrawGlyphs(const InstanceHandle& instance,
                          ImageData* image,
                          const FontDescription_Dev& font_desc,
                          uint32_t color,
@@ -42,18 +43,20 @@ class Flash {
                          uint32_t glyph_count,
                          const uint16_t glyph_indices[],
                          const PP_Point glyph_advances[]);
-  static Var GetProxyForURL(Instance* instance, const std::string& url);
+  static Var GetProxyForURL(const InstanceHandle& instance,
+                            const std::string& url);
   static int32_t Navigate(const URLRequestInfo& request_info,
                           const std::string& target,
                           bool from_user_action);
-  static void RunMessageLoop(Instance* instance);
-  static void QuitMessageLoop(Instance* instance);
-  static double GetLocalTimeZoneOffset(Instance* instance, PP_Time t);
+  static void RunMessageLoop(const InstanceHandle& instance);
+  static void QuitMessageLoop(const InstanceHandle& instance);
+  static double GetLocalTimeZoneOffset(const InstanceHandle& instance,
+                                       PP_Time t);
   static Var GetCommandLineArgs(Module* module);
   static void PreloadFontWin(const void* logfontw);
-  static bool IsRectTopmost(Instance* instance, const Rect& rect);
-  static int32_t InvokePrinting(Instance* instance);
-  static void UpdateActivity(Instance* instance);
+  static bool IsRectTopmost(const InstanceHandle& instance, const Rect& rect);
+  static int32_t InvokePrinting(const InstanceHandle& instance);
+  static void UpdateActivity(const InstanceHandle& instance);
 
 };