Do PPB_FileIO Query and Read in the plugin process.

ppapi/shared_impl/tracked_callback_unittest.cc

Index: ppapi/shared_impl/tracked_callback_unittest.cc
diff --git a/ppapi/shared_impl/tracked_callback_unittest.cc b/ppapi/shared_impl/tracked_callback_unittest.cc
index a9961f015b5ea5d70bad76c25679fbc6d61acd3d..9ceb96e7cf7734a40d27ee0e0c946b9532f14e51 100644
--- a/ppapi/shared_impl/tracked_callback_unittest.cc
+++ b/ppapi/shared_impl/tracked_callback_unittest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "ppapi/c/pp_completion_callback.h"
@@ -37,11 +38,20 @@ class TrackedCallbackTest : public testing::Test {
   PP_Instance pp_instance_;
 };
 
+// All valid results (PP_OK, PP_ERROR_...) are nonpositive.
+const int32_t kInitializedResultValue = 1;
+const int32_t kOverrideResultValue = 2;
+
 struct CallbackRunInfo {
-  // All valid results (PP_OK, PP_ERROR_...) are nonpositive.
-  CallbackRunInfo() : run_count(0), result(1) {}
+  CallbackRunInfo()
+      : run_count(0),
+        result(kInitializedResultValue),
+        completion_task_run_count(0),
+        completion_task_result(kInitializedResultValue) {}
   unsigned run_count;
   int32_t result;
+  unsigned completion_task_run_count;
+  int32_t completion_task_result;
 };
 
 void TestCallback(void* user_data, int32_t result) {
@@ -144,18 +154,38 @@ class CallbackMockResource : public Resource {
         this,
         PP_MakeCompletionCallback(&TestCallback, &info_did_run_));
     EXPECT_EQ(0U, info_did_run_.run_count);
+    EXPECT_EQ(0U, info_did_run_.completion_task_run_count);
+
+    // In order to test that the completion task can override the callback
+    // result, we need to test callbacks with and without a completion task.
+    callback_did_run_with_completion_task_ = new TrackedCallback(
+        this,
+        PP_MakeCompletionCallback(&TestCallback,
+                                  &info_did_run_with_completion_task_));
+    callback_did_run_with_completion_task_->set_completion_task(
+        Bind(&CallbackMockResource::CompletionTask, this,
+             &info_did_run_with_completion_task_));
+    EXPECT_EQ(0U, info_did_run_with_completion_task_.run_count);
+    EXPECT_EQ(0U, info_did_run_with_completion_task_.completion_task_run_count);
 
     callback_did_abort_ = new TrackedCallback(
         this,
         PP_MakeCompletionCallback(&TestCallback, &info_did_abort_));
+    callback_did_abort_->set_completion_task(
+        Bind(&CallbackMockResource::CompletionTask, this, &info_did_abort_));
     EXPECT_EQ(0U, info_did_abort_.run_count);
+    EXPECT_EQ(0U, info_did_abort_.completion_task_run_count);
 
     callback_didnt_run_ = new TrackedCallback(
         this,
         PP_MakeCompletionCallback(&TestCallback, &info_didnt_run_));
+    callback_didnt_run_->set_completion_task(
+        Bind(&CallbackMockResource::CompletionTask, this, &info_didnt_run_));
     EXPECT_EQ(0U, info_didnt_run_.run_count);
+    EXPECT_EQ(0U, info_didnt_run_.completion_task_run_count);
 
     callback_did_run_->Run(PP_OK);
+    callback_did_run_with_completion_task_->Run(PP_OK);
     callback_did_abort_->Abort();
 
     CheckIntermediateState();
@@ -163,13 +193,34 @@ class CallbackMockResource : public Resource {
     return resource_id;
   }
 
+  int32_t CompletionTask(CallbackRunInfo* info, int32_t result) {
+    // We should run before the callback.
+    EXPECT_EQ(0U, info->run_count);
+    info->completion_task_run_count++;
+    if (info->completion_task_run_count == 1)
+      info->completion_task_result = result;
+    return kOverrideResultValue;
+  }
+
   void CheckIntermediateState() {
     EXPECT_EQ(1U, info_did_run_.run_count);
     EXPECT_EQ(PP_OK, info_did_run_.result);
+    EXPECT_EQ(0U, info_did_run_.completion_task_run_count);
+
+    EXPECT_EQ(1U, info_did_run_with_completion_task_.run_count);
+    // completion task should override the result.
+    EXPECT_EQ(kOverrideResultValue, info_did_run_with_completion_task_.result);
+    EXPECT_EQ(1U, info_did_run_with_completion_task_.completion_task_run_count);
+    EXPECT_EQ(PP_OK,
+              info_did_run_with_completion_task_.completion_task_result);
 
     EXPECT_EQ(1U, info_did_abort_.run_count);
+    // completion task shouldn't override an abort.
     EXPECT_EQ(PP_ERROR_ABORTED, info_did_abort_.result);
+    EXPECT_EQ(1U, info_did_abort_.completion_task_run_count);
+    EXPECT_EQ(PP_ERROR_ABORTED, info_did_abort_.completion_task_result);
 
+    EXPECT_EQ(0U, info_didnt_run_.completion_task_run_count);
     EXPECT_EQ(0U, info_didnt_run_.run_count);
   }
 
@@ -185,6 +236,9 @@ class CallbackMockResource : public Resource {
   scoped_refptr<TrackedCallback> callback_did_run_;
   CallbackRunInfo info_did_run_;
 
+  scoped_refptr<TrackedCallback> callback_did_run_with_completion_task_;
+  CallbackRunInfo info_did_run_with_completion_task_;
+
   scoped_refptr<TrackedCallback> callback_did_abort_;
   CallbackRunInfo info_did_abort_;