Convert audio-related messages to the new thunk/API system for Pepper.

This has a bit of a change from the previous couple of resources that were
converted in that the ResourceCreationProxy now calls a static proxy function
for actually doing the work. It became too complicated and required that the
ResourceCreationProxy know a lot about the internals of the objects.

Did a little namespace cleanup. This renames "pp::shared_impl" to just use the
"ppapi" namespace. The "shared_impl" was ugly and didn't help anything. Some
files in that directory used "ppapi::shared_impl" instead which was even more
confusing.

Do a little build cleanup. The old ppapi_shared_proxy.gypi is now split into
two sub-files, one for ppapi_shared, and one for ppapi_proxy. It's hopefully
easier to find stuff now.
Review URL: http://codereview.chromium.org/7014024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@85303 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ppapi/proxy/plugin_dispatcher.h b/ppapi/proxy/plugin_dispatcher.h
index 959a7ac..65c4c826 100644
--- a/ppapi/proxy/plugin_dispatcher.h
+++ b/ppapi/proxy/plugin_dispatcher.h
@@ -80,13 +80,13 @@
                           const base::Closure& task);
 
   // Returns the WebKitForwarding object used to forward events to WebKit.
-  pp::shared_impl::WebKitForwarding* GetWebKitForwarding();
+  ppapi::WebKitForwarding* GetWebKitForwarding();
 
   // Returns the "new-style" function API for the given interface ID, creating
   // it if necessary.
   // TODO(brettw) this is in progress. It should be merged with the target
   // proxies so there is one list to consult.
-  ::ppapi::shared_impl::FunctionGroupBase* GetFunctionAPI(
+  ppapi::FunctionGroupBase* GetFunctionAPI(
       pp::proxy::InterfaceID id);
 
  private:
@@ -106,7 +106,7 @@
   // Function proxies created for "new-style" FunctionGroups.
   // TODO(brettw) this is in progress. It should be merged with the target
   // proxies so there is one list to consult.
-  scoped_ptr< ::ppapi::shared_impl::FunctionGroupBase >
+  scoped_ptr< ::ppapi::FunctionGroupBase >
       function_proxies_[INTERFACE_ID_COUNT];
 
   typedef base::hash_map<PP_Instance, InstanceData> InstanceDataMap;