Try to reduce the flankness of the PPAPI UI tests.

ppapi/tests/testing_instance.cc

Index: ppapi/tests/testing_instance.cc
===================================================================
--- ppapi/tests/testing_instance.cc	(revision 98050)
+++ ppapi/tests/testing_instance.cc	(working copy)
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 #include <cstring>
+#include <sstream>
 #include <vector>
 
 #include "ppapi/cpp/module.h"
@@ -14,6 +15,10 @@
 
 TestCaseFactory* TestCaseFactory::head_ = NULL;
 
+// Cookie value we use to signal "we're still working." See the comment above
+// the class declaration for how this works.
+static const char kProgressSignal[] = "...";
+
 // Returns a new heap-allocated test case for the given test, or NULL on
 // failure.
 TestingInstance::TestingInstance(PP_Instance instance)
@@ -23,6 +28,7 @@
     : pp::InstancePrivate(instance),
 #endif
       current_case_(NULL),
+      progress_cookie_number_(0),
       executed_tests_(false),
       nacl_mode_(false) {
   callback_factory_.Initialize(this);
@@ -87,6 +93,9 @@
 
 void TestingInstance::LogTest(const std::string& test_name,
                               const std::string& error_message) {
+  // Tell the browser we're still working.
+  ReportProgress(kProgressSignal);
+
   std::string html;
   html.append("<div class=\"test_line\"><span class=\"test_name\">");
   html.append(test_name);
@@ -113,7 +122,7 @@
 }
 
 void TestingInstance::ExecuteTests(int32_t unused) {
-  SetCookie("STARTUP_COOKIE", "STARTED");
+  ReportProgress(kProgressSignal);
 
   // Clear the console.
   PostMessage(pp::Var("TESTING_MESSAGE:ClearConsole"));
@@ -134,7 +143,7 @@
   }
 
   // Declare we're done by setting a cookie to either "PASS" or the errors.
-  SetCookie("COMPLETION_COOKIE", errors_.empty() ? "PASS" : errors_);
+  ReportProgress(errors_.empty() ? "PASS" : errors_);
   PostMessage(pp::Var("TESTING_MESSAGE:DidExecuteTests"));
 }
 
@@ -189,6 +198,14 @@
   PostMessage(pp::Var(message));
 }
 
+void TestingInstance::ReportProgress(const std::string& progress_value) {
+  // Use streams since nacl doesn't compile base yet (for StringPrintf).
+  std::ostringstream cookie_name;
+  cookie_name << "PPAPI_PROGRESS_" << progress_cookie_number_;
+  SetCookie(cookie_name.str(), progress_value);
+  progress_cookie_number_++;
+}
+
 void TestingInstance::SetCookie(const std::string& name,
                                 const std::string& value) {
   std::string message("TESTING_MESSAGE:SetCookie:");