Plugin Power Saver: Throttled Plugins should block TCPSocket reads.

content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.h

Index: content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.h
diff --git a/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.h b/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.h
index d0e672aa7a24e59c5a8ae14b24950fbf4dadb6a4..e88a1e64a1c3435af218084ee3bfdb8f35e07221 100644
--- a/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.h
+++ b/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.h
@@ -12,6 +12,7 @@
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
 #include "content/browser/renderer_host/pepper/ssl_context_helper.h"
 #include "content/common/content_export.h"
 #include "net/base/address_list.h"
@@ -47,7 +48,8 @@ class ContentBrowserPepperHostFactory;
 class ResourceContext;
 
 class CONTENT_EXPORT PepperTCPSocketMessageFilter
-    : public ppapi::host::ResourceMessageFilter {
+    : public ppapi::host::ResourceMessageFilter,
+      public BrowserPpapiHostImpl::InstanceObserver {
  public:
   PepperTCPSocketMessageFilter(ContentBrowserPepperHostFactory* factory,
                                BrowserPpapiHostImpl* host,
@@ -78,6 +80,9 @@ class CONTENT_EXPORT PepperTCPSocketMessageFilter
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;
 
+  // BrowserPpapiHostImpl::InstanceObserver overrides.
+  void OnThrottleStateChanged(bool is_throttled) override;
+
   int32_t OnMsgBind(const ppapi::host::HostMessageContext* context,
                     const PP_NetAddress_Private& net_addr);
   int32_t OnMsgConnect(const ppapi::host::HostMessageContext* context,
@@ -176,7 +181,7 @@ class CONTENT_EXPORT PepperTCPSocketMessageFilter
 
   // The following fields are used only on the IO thread.
   // Non-owning ptr.
-  ppapi::host::PpapiHost* ppapi_host_;
+  BrowserPpapiHostImpl* host_;
   // Non-owning ptr.
   ContentBrowserPepperHostFactory* factory_;
   PP_Instance instance_;
@@ -226,6 +231,12 @@ class CONTENT_EXPORT PepperTCPSocketMessageFilter
   scoped_ptr<net::TCPSocket> accepted_socket_;
   net::IPEndPoint accepted_address_;
 
+  // If the plugin is throttled, we defer completing socket reads until
+  // the plugin is unthrottled.
+  bool pending_read_on_unthrottle_;
+  ppapi::host::ReplyMessageContext pending_read_reply_message_context_;
+  int pending_read_net_result_;
+
   DISALLOW_COPY_AND_ASSIGN(PepperTCPSocketMessageFilter);
 };