Rewrite PPB_AudioInput_Dev to use the new-style host/resource.

content/public/renderer/renderer_ppapi_host.h

Index: content/public/renderer/renderer_ppapi_host.h
diff --git a/content/public/renderer/renderer_ppapi_host.h b/content/public/renderer/renderer_ppapi_host.h
index e223094839e2c934c401ee764e50fd9738a207ea..8f8dfb3690d456a7815394c23ac3393f36008546 100644
--- a/content/public/renderer/renderer_ppapi_host.h
+++ b/content/public/renderer/renderer_ppapi_host.h
@@ -6,7 +6,9 @@
 #define CONTENT_PUBLIC_RENDERER_RENDERER_PPAPI_HOST_H_
 
 #include "base/memory/ref_counted.h"
+#include "base/platform_file.h"
 #include "content/common/content_export.h"
+#include "ipc/ipc_platform_file.h"
 #include "ppapi/c/pp_instance.h"
 
 class FilePath;
@@ -22,6 +24,12 @@ class PpapiHost;
 }
 }
 
+namespace webkit {
+namespace ppapi {
+class PluginInstance;
+}
+}
+
 namespace WebKit {
 class WebPluginContainer;
 }
@@ -63,6 +71,11 @@ class RendererPpapiHost {
   // plugin associated with this host.
   virtual bool IsValidInstance(PP_Instance instance) const = 0;
 
+  // Returns the PluginInstance for the given PP_Instance, or NULL if the
+  // PP_Instance is invalid.
+  virtual webkit::ppapi::PluginInstance* GetPluginInstance(
+      PP_Instance instance) const = 0;
+
   // Returns the RenderView for the given plugin instance, or NULL if the
   // instance is invalid.
   virtual RenderView* GetRenderViewForInstance(PP_Instance instance) const = 0;
@@ -79,6 +92,16 @@ class RendererPpapiHost {
   // if there is no current user gesture.
   virtual bool HasUserGesture(PP_Instance instance) const = 0;
 
+  // Shares a file handle (HANDLE / file descriptor) with the remote side. It
+  // returns a handle that should be sent in exactly one IPC message. Upon
+  // receipt, the remote side then owns that handle. Note: if sending the
+  // message fails, the returned handle is properly closed by the IPC system. If
+  // |should_close_source| is set to true, the original handle is closed by this
+  // operation and should not be used again.
+  virtual IPC::PlatformFileForTransit ShareHandleWithRemote(
+      base::PlatformFile handle,
+      bool should_close_source) = 0;
+
  protected:
   virtual ~RendererPpapiHost() {}
 };