Even more test cleanup. Some fixes to non-test code.

chrome/test/webdriver/commands/source_command.cc

Index: chrome/test/webdriver/commands/source_command.cc
diff --git a/chrome/test/webdriver/commands/source_command.cc b/chrome/test/webdriver/commands/source_command.cc
index 706d3eae8a858b42235b768b8bc1fdcf398f10c9..1e6b653189e6b5b6eb2d2f06b819a34633e86ed7 100644
--- a/chrome/test/webdriver/commands/source_command.cc
+++ b/chrome/test/webdriver/commands/source_command.cc
@@ -15,6 +15,16 @@ const wchar_t* const kSource[] = {
     L"new XMLSerializer().serializeToString(document));",
 };
 
+SourceCommand::SourceCommand(const std::vector<std::string>& path_segments,
+                             const DictionaryValue* const parameters)
+    : WebDriverCommand(path_segments, parameters) {}
+
+SourceCommand::~SourceCommand() {}
+
+bool SourceCommand::DoesGet() {
+  return true;
+}
+
 void SourceCommand::ExecuteGet(Response* const response) {
   std::string jscript = build_atom(kSource, sizeof kSource);
   Value* result = NULL;
@@ -33,4 +43,8 @@ void SourceCommand::ExecuteGet(Response* const response) {
   response->set_status(kSuccess);
 }
 
+bool SourceCommand::RequiresValidTab() {
+  return true;
+}
+
 }  // namespace webdriver