Make content verification see 0-byte files.

extensions/browser/extension_protocols.cc

Index: extensions/browser/extension_protocols.cc
diff --git a/extensions/browser/extension_protocols.cc b/extensions/browser/extension_protocols.cc
index ccd37cdfb6cafef3d4e8bd48b3db145099482c03..ef0c65a5eb69b7396123bb41f469e7e38aeef68d 100644
--- a/extensions/browser/extension_protocols.cc
+++ b/extensions/browser/extension_protocols.cc
@@ -268,14 +268,17 @@ class URLRequestExtensionJob : public net::URLRequestFileJob {
                                   -result);
     if (result > 0) {
       bytes_read_ += result;
-      if (verify_job_.get()) {
+      if (verify_job_.get())
         verify_job_->BytesRead(result, buffer->data());
-        if (!remaining_bytes())
-          verify_job_->DoneReading();
-      }
     }
   }
 
+  void DoneReading() override {
+    URLRequestFileJob::DoneReading();
+    if (verify_job_.get())
+      verify_job_->DoneReading();
+  }
+
  private:
   ~URLRequestExtensionJob() override {
     UMA_HISTOGRAM_COUNTS("ExtensionUrlRequest.TotalKbRead", bytes_read_ / 1024);