Use precompiled headers for most large projects.

ppapi/proxy/host_dispatcher.h

Index: ppapi/proxy/host_dispatcher.h
diff --git a/ppapi/proxy/host_dispatcher.h b/ppapi/proxy/host_dispatcher.h
index 08d4dd6d5b4902de944c0c4c7f184cc91c3d39ed..f10b23703bda9a42363921ea6f23c83ad3cf6a1f 100644
--- a/ppapi/proxy/host_dispatcher.h
+++ b/ppapi/proxy/host_dispatcher.h
@@ -81,7 +81,7 @@ class HostDispatcher : public Dispatcher {
   // if the plugin supports the given interface (with caching) and returns the
   // pointer to the proxied interface if it is supported. Returns NULL if the
   // given interface isn't supported by the plugin or the proxy.
-  const void* GetProxiedInterface(const std::string& interface);
+  const void* GetProxiedInterface(const std::string& iface);
 
   // Returns the proxy object associated with the given interface ID, creating
   // it if necessary. This is used in cases where a proxy needs to access code