Provide a safer URLLoader ReadResponseBody API

ppapi/tests/test_url_loader.h

Index: ppapi/tests/test_url_loader.h
diff --git a/ppapi/tests/test_url_loader.h b/ppapi/tests/test_url_loader.h
index 95c97b1f14c7a451b28973c69380bc1782fa0b00..4bcc4eee80496bc2e4de1260fe7456d4c36656dd 100644
--- a/ppapi/tests/test_url_loader.h
+++ b/ppapi/tests/test_url_loader.h
@@ -31,8 +31,12 @@ class TestURLLoader : public TestCase {
   std::string ReadEntireFile(pp::FileIO* file_io, std::string* data);
   std::string ReadEntireResponseBody(pp::URLLoader* loader,
                                      std::string* body);
+  std::string ReadEntireResponseBodyToArray(pp::URLLoader* loader,
+                                            std::string* body);
   std::string LoadAndCompareBody(const pp::URLRequestInfo& request,
                                  const std::string& expected_body);
+  std::string LoadAndCompareBody_ToArray(const pp::URLRequestInfo& request,
+                                         const std::string& expected_body);
   int32_t OpenFileSystem(pp::FileSystem* file_system, std::string* message);
   int32_t PrepareFileForPost(const pp::FileRef& file_ref,
                              const std::string& data,
@@ -50,6 +54,7 @@ class TestURLLoader : public TestCase {
   int32_t OpenWithPrefetchBufferThreshold(int32_t lower, int32_t upper);
 
   std::string TestBasicGET();
+  std::string TestBasicGET_ToArray();
   std::string TestBasicPOST();
   std::string TestBasicFilePOST();
   std::string TestBasicFileRangePOST();