Add a new globals object for PPAPI tracking information.

ppapi/proxy/ppb_graphics_2d_proxy.cc

Index: ppapi/proxy/ppb_graphics_2d_proxy.cc
diff --git a/ppapi/proxy/ppb_graphics_2d_proxy.cc b/ppapi/proxy/ppb_graphics_2d_proxy.cc
index dcf8d262d612cc70c0bd71f2ba2f893b66d51e7d..7bed6794239895235999a5f977fd11a75b7610cd 100644
--- a/ppapi/proxy/ppb_graphics_2d_proxy.cc
+++ b/ppapi/proxy/ppb_graphics_2d_proxy.cc
@@ -87,8 +87,8 @@ PP_Bool Graphics2D::Describe(PP_Size* size, PP_Bool* is_always_opaque) {
 void Graphics2D::PaintImageData(PP_Resource image_data,
                                 const PP_Point* top_left,
                                 const PP_Rect* src_rect) {
-  Resource* image_object = PluginResourceTracker::GetInstance()->
-      GetResource(image_data);
+  Resource* image_object =
+      PpapiGlobals::Get()->GetResourceTracker()->GetResource(image_data);
   if (!image_object || pp_instance() != image_object->pp_instance())
     return;
 
@@ -110,8 +110,8 @@ void Graphics2D::Scroll(const PP_Rect* clip_rect,
 }
 
 void Graphics2D::ReplaceContents(PP_Resource image_data) {
-  Resource* image_object = PluginResourceTracker::GetInstance()->
-      GetResource(image_data);
+  Resource* image_object =
+      PpapiGlobals::Get()->GetResourceTracker()->GetResource(image_data);
   if (!image_object || pp_instance() != image_object->pp_instance())
     return;