Add a new globals object for PPAPI tracking information.

ppapi/shared_impl/video_decoder_impl.cc

Index: ppapi/shared_impl/video_decoder_impl.cc
diff --git a/ppapi/shared_impl/video_decoder_impl.cc b/ppapi/shared_impl/video_decoder_impl.cc
index 71921f925b0ad31b730e491aa4f53bfe7b7bc598..0b6d4e50e73698a50ae0a9c85efcc91ec46521c8 100644
--- a/ppapi/shared_impl/video_decoder_impl.cc
+++ b/ppapi/shared_impl/video_decoder_impl.cc
@@ -32,14 +32,14 @@ void VideoDecoderImpl::InitCommon(
   DCHECK(graphics_context);
   DCHECK(!gles2_impl_ && !graphics_context_);
   gles2_impl_ = gles2_impl;
-  TrackerBase::Get()->GetResourceTracker()->AddRefResource(graphics_context);
+  PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(graphics_context);
   graphics_context_ = graphics_context;
 }
 
 void VideoDecoderImpl::Destroy() {
   graphics_context_ = 0;
   gles2_impl_ = NULL;
-  TrackerBase::Get()->GetResourceTracker()->ReleaseResource(graphics_context_);
+  PpapiGlobals::Get()->GetResourceTracker()->ReleaseResource(graphics_context_);
 }
 
 bool VideoDecoderImpl::SetFlushCallback(PP_CompletionCallback callback) {