Provide a safer URLLoader ReadResponseBody API

ppapi/thunk/ppb_url_loader_thunk.cc

Index: ppapi/thunk/ppb_url_loader_thunk.cc
diff --git a/ppapi/thunk/ppb_url_loader_thunk.cc b/ppapi/thunk/ppb_url_loader_thunk.cc
index 23113cd1ce7aff0d65276b46e71df536cabc3db1..00fd0bac5c060c671e3ff8e9f7fd2bb45675fc99 100644
--- a/ppapi/thunk/ppb_url_loader_thunk.cc
+++ b/ppapi/thunk/ppb_url_loader_thunk.cc
@@ -90,6 +90,17 @@ int32_t ReadResponseBody(PP_Resource loader,
                                                           enter.callback()));
 }
 
+int32_t ReadResponseBodyToArray(PP_Resource loader,
+                                int32_t max_read_length,
+                                PP_ArrayOutput* buffer,
+                                PP_CompletionCallback callback) {
+  EnterURLLoader enter(loader, callback, true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.SetResult(enter.object()->ReadResponseBodyToArray(
+      max_read_length, buffer, enter.callback()));
+}
+
 int32_t FinishStreamingToFile(PP_Resource loader,
                               PP_CompletionCallback callback) {
   EnterURLLoader enter(loader, callback, true);
@@ -118,7 +129,21 @@ void SetStatusCallback(PP_Resource loader,
     enter.object()->SetStatusCallback(cb);
 }
 
-const PPB_URLLoader g_ppb_urlloader_thunk = {
+const PPB_URLLoader_1_1 g_ppb_urlloader_thunk = {
+  &Create,
+  &IsURLLoader,
+  &Open,
+  &FollowRedirect,
+  &GetUploadProgress,
+  &GetDownloadProgress,
+  &GetResponseInfo,
+  &ReadResponseBody,
+  &FinishStreamingToFile,
+  &Close,
+  &ReadResponseBodyToArray
+};
+
+const PPB_URLLoader_1_0 g_ppb_urlloader_thunk_1_0 = {
   &Create,
   &IsURLLoader,
   &Open,
@@ -138,10 +163,14 @@ const PPB_URLLoaderTrusted g_ppb_urlloader_trusted_thunk = {
 
 }  // namespace
 
-const PPB_URLLoader_1_0* GetPPB_URLLoader_1_0_Thunk() {
+const PPB_URLLoader_1_1* GetPPB_URLLoader_1_1_Thunk() {
   return &g_ppb_urlloader_thunk;
 }
 
+const PPB_URLLoader_1_0* GetPPB_URLLoader_1_0_Thunk() {
+  return &g_ppb_urlloader_thunk_1_0;
+}
+
 const PPB_URLLoaderTrusted_0_3* GetPPB_URLLoaderTrusted_0_3_Thunk() {
   return &g_ppb_urlloader_trusted_thunk;
 }