Convert //shell/... to use set_connection_error_handler() instead of set_error_handler().

shell/child_main.cc

Index: shell/child_main.cc
diff --git a/shell/child_main.cc b/shell/child_main.cc
index 447a93918bd5042ace253a2ece0a0bc0b3f4aafd..05abbc6733f8b7b9adc3686ff11c83447493b36c 100644
--- a/shell/child_main.cc
+++ b/shell/child_main.cc
@@ -175,7 +175,7 @@ class AppContext : public mojo::embedder::SlaveProcessDelegate {
 
 // ChildControllerImpl ---------------------------------------------------------
 
-class ChildControllerImpl : public ChildController, public mojo::ErrorHandler {
+class ChildControllerImpl : public ChildController {
  public:
   ~ChildControllerImpl() override {
     DCHECK(thread_checker_.CalledOnValidThread());
@@ -210,14 +210,6 @@ class ChildControllerImpl : public ChildController, public mojo::ErrorHandler {
     binding_.Bind(handle.Pass());
   }
 
-  // |mojo::ErrorHandler| methods:
-  void OnConnectionError() override {
-    // A connection error means the connection to the shell is lost. This is not
-    // recoverable.
-    LOG(ERROR) << "Connection error to the shell";
-    _exit(1);
-  }
-
   // |ChildController| methods:
   void StartApp(const mojo::String& app_path,
                 mojo::InterfaceRequest<mojo::Application> application_request,
@@ -243,7 +235,14 @@ class ChildControllerImpl : public ChildController, public mojo::ErrorHandler {
         unblocker_(unblocker),
         channel_info_(nullptr),
         binding_(this) {
-    binding_.set_error_handler(this);
+    binding_.set_connection_error_handler([this]() { OnConnectionError(); });
+  }
+
+  void OnConnectionError() {
+    // A connection error means the connection to the shell is lost. This is not
+    // recoverable.
+    LOG(ERROR) << "Connection error to the shell";
+    _exit(1);
   }
 
   // Callback for |mojo::embedder::ConnectToMaster()|.