Suppress text dump of JavaScript modal dialog messages in testharness.js tests

components/test_runner/web_frame_test_client.cc

Index: components/test_runner/web_frame_test_client.cc
diff --git a/components/test_runner/web_frame_test_client.cc b/components/test_runner/web_frame_test_client.cc
index 84ca1d666e3afeaf667509802eb0f9a79977e6c0..22056d8fbb1196d3ae6327786af3a6c0f05e9b59 100644
--- a/components/test_runner/web_frame_test_client.cc
+++ b/components/test_runner/web_frame_test_client.cc
@@ -188,12 +188,16 @@ blink::WebColorChooser* WebFrameTestClient::createColorChooser(
 }
 
 void WebFrameTestClient::runModalAlertDialog(const blink::WebString& message) {
+  if (!test_runner()->ShouldDumpJavaScriptDialogs())
+    return;
   delegate_->PrintMessage(std::string("ALERT: ") + message.utf8().data() +
                           "\n");
 }
 
 bool WebFrameTestClient::runModalConfirmDialog(
     const blink::WebString& message) {
+  if (!test_runner()->ShouldDumpJavaScriptDialogs())
+    return true;
   delegate_->PrintMessage(std::string("CONFIRM: ") + message.utf8().data() +
                           "\n");
   return true;
@@ -203,6 +207,8 @@ bool WebFrameTestClient::runModalPromptDialog(
     const blink::WebString& message,
     const blink::WebString& default_value,
     blink::WebString* actual_value) {
+  if (!test_runner()->ShouldDumpJavaScriptDialogs())
+    return true;
   delegate_->PrintMessage(std::string("PROMPT: ") + message.utf8().data() +
                           ", default text: " + default_value.utf8().data() +
                           "\n");
@@ -210,7 +216,8 @@ bool WebFrameTestClient::runModalPromptDialog(
 }
 
 bool WebFrameTestClient::runModalBeforeUnloadDialog(bool is_reload) {
-  delegate_->PrintMessage(std::string("CONFIRM NAVIGATION\n"));
+  if (test_runner()->ShouldDumpJavaScriptDialogs())
+    delegate_->PrintMessage(std::string("CONFIRM NAVIGATION\n"));
   return !test_runner()->shouldStayOnPageAfterHandlingBeforeUnload();
 }