Adds error handling support for the SwReporter launcher.

chrome/browser/safe_browsing/srt_chrome_prompt_impl.cc

Index: chrome/browser/safe_browsing/srt_chrome_prompt_impl.cc
diff --git a/chrome/browser/safe_browsing/srt_chrome_prompt_impl.cc b/chrome/browser/safe_browsing/srt_chrome_prompt_impl.cc
index 38bb6015efc851f563ca2bece0c69110a7fda174..bf052da5421842d46e3a77f03ce83480db85e82e 100644
--- a/chrome/browser/safe_browsing/srt_chrome_prompt_impl.cc
+++ b/chrome/browser/safe_browsing/srt_chrome_prompt_impl.cc
@@ -15,7 +15,10 @@ using chrome_cleaner::mojom::PromptAcceptance;
 using chrome_cleaner::mojom::UwSPtr;
 
 ChromePromptImpl::ChromePromptImpl(ChromePromptRequest request)
-    : binding_(this, std::move(request)) {}
+    : binding_(this, std::move(request)) {
+  binding_.set_connection_error_handler(base::Bind(
+      &ChromePromptImpl::OnConnectionClosed, base::RetainedRef(this)));
+}
 
 ChromePromptImpl::~ChromePromptImpl() {}
 
@@ -28,4 +31,15 @@ void ChromePromptImpl::PromptUser(
   callback.Run(PromptAcceptance::DENIED);
 }
 
+void ChromePromptImpl::OnConnectionClosed() {
+  // Placeholder. This should handle cases when the reporter process is
+  // disconnected (e.g. due to a crash) and the prompt dialog is being shown
+  // to the user.
+}
+
+void ChromePromptImpl::OnConnectionError(const std::string& message) {
+  // Placeholder. This should handle cases when the reporter process sends
+  // a bad message and the prompt dialog is being shown to the user.
+}
+
 }  // namespace safe_browsing