[chromedriver] Add an error autoreporting feature that automatically raises errors from browser logs

chrome/test/chromedriver/session.cc

Index: chrome/test/chromedriver/session.cc
diff --git a/chrome/test/chromedriver/session.cc b/chrome/test/chromedriver/session.cc
index a133832da828345795d6539d25a173453ac83cca..91370da1d3b451059eb45ffad274af78f9a86e53 100644
--- a/chrome/test/chromedriver/session.cc
+++ b/chrome/test/chromedriver/session.cc
@@ -39,7 +39,8 @@ Session::Session(const std::string& id)
       force_devtools_screenshot(false),
       sticky_modifiers(0),
       mouse_position(0, 0),
-      page_load_timeout(kDefaultPageLoadTimeout) {}
+      page_load_timeout(kDefaultPageLoadTimeout),
+      auto_reporting_enabled(false) {}
 
 Session::Session(const std::string& id, scoped_ptr<Chrome> chrome)
     : id(id),
@@ -49,7 +50,8 @@ Session::Session(const std::string& id, scoped_ptr<Chrome> chrome)
       chrome(chrome.Pass()),
       sticky_modifiers(0),
       mouse_position(0, 0),
-      page_load_timeout(kDefaultPageLoadTimeout) {}
+      page_load_timeout(kDefaultPageLoadTimeout),
+      auto_reporting_enabled(false) {}
 
 Session::~Session() {}
 
@@ -93,6 +95,19 @@ std::vector<WebDriverLog*> Session::GetAllLogs() const {
   return logs;
 }
 
+std::string Session::GetFirstBrowserError() const {
+  for (ScopedVector<WebDriverLog>::const_iterator it = devtools_logs.begin();
+       it != devtools_logs.end();
+       ++it) {
+    if ((*it)->type() == WebDriverLog::kBrowserType) {
+      std::string message = (*it)->GetFirstErrorMessage();
+      if (!message.empty())
+        return message;
+    }
+  }
+  return std::string();
+}
+
 Session* GetThreadLocalSession() {
   return lazy_tls_session.Pointer()->Get();
 }