Fix gles2_conform_test failures when Mac switching to core profile

gpu/gles2_conform_support/gles2_conform_test.cc

Index: gpu/gles2_conform_support/gles2_conform_test.cc
diff --git a/gpu/gles2_conform_support/gles2_conform_test.cc b/gpu/gles2_conform_support/gles2_conform_test.cc
index 6c80b3061baca05f8b0f3c4176baa2b98a8458ca..ff1bafeb8e7a1b63afef7e0649cc19afbffc32fb 100644
--- a/gpu/gles2_conform_support/gles2_conform_test.cc
+++ b/gpu/gles2_conform_support/gles2_conform_test.cc
@@ -111,7 +111,7 @@ bool RunGLES2ConformTest(const char* path) {
   cmd_line.AppendArg(std::string("-run=") + path);
 
   std::string output;
-  bool success = base::GetAppOutput(cmd_line, &output);
+  bool success = base::GetAppOutputAndError(cmd_line, &output);

[Zhenyao Mo, 2016/08/17 19:38:36]

This makes debugging gles2_conform_test easier.

   if (success) {
     size_t success_index = output.find("Conformance PASSED all");
     size_t failed_index = output.find("FAILED");