Delete the temporary file when generating MHTML with the extension API.

chrome/renderer/extensions/extension_process_bindings.cc

Index: chrome/renderer/extensions/extension_process_bindings.cc
diff --git a/chrome/renderer/extensions/extension_process_bindings.cc b/chrome/renderer/extensions/extension_process_bindings.cc
index c1aa392ec2ef07f16ce53f9f891f86a7a65ccbbb..c203ffad640ab4b86e18c4bc2d2cbcd749c25940 100644
--- a/chrome/renderer/extensions/extension_process_bindings.cc
+++ b/chrome/renderer/extensions/extension_process_bindings.cc
@@ -203,6 +203,9 @@ class ExtensionImpl : public ChromeV8Extension {
       return v8::FunctionTemplate::New(DecodeJPEG, v8::External::New(this));
     } else if (name->Equals(v8::String::New("CreateBlob"))) {
       return v8::FunctionTemplate::New(CreateBlob, v8::External::New(this));
+    } else if (name->Equals(v8::String::New("SendResponseAck"))) {
+      return v8::FunctionTemplate::New(SendResponseAck,
+                                       v8::External::New(this));
     }
 
     return ChromeV8Extension::GetNativeFunction(name);
@@ -373,6 +376,18 @@ class ExtensionImpl : public ChromeV8Extension {
     return blob.toV8Value();
   }
 
+  static v8::Handle<v8::Value> SendResponseAck(const v8::Arguments& args) {
+    CHECK(args.Length() == 1);
+    CHECK(args[0]->IsInt32());
+
+    content::RenderView* render_view = GetCurrentRenderView();
+    if (render_view) {
+      render_view->Send(new ExtensionHostMsg_ResponseAck(
+          render_view->GetRoutingId(), args[0]->Int32Value()));
+    }
+    return v8::Undefined();
+  }
+
   // Creates a new messaging channel to the tab with the given ID.
   static v8::Handle<v8::Value> OpenChannelToTab(const v8::Arguments& args) {
     // Get the current RenderView so that we can send a routed IPC message from