tools/battor_agent: Fix unit test compile warnings on other platforms

tools/battor_agent/battor_agent_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/battor_agent/battor_agent.h"
 
 #include "base/test/test_simple_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 454 matching lines @@
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
                             CreateFrame(frame_header1, frame1, 3));
 
   BattOrFrameHeader frame_header2{0, 1 * sizeof(RawBattOrSample)};
   RawBattOrSample frame2[] = {RawBattOrSample{1, 1}};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
                             CreateFrame(frame_header2, frame2, 1));
 
   // Send an empty last frame to indicate that we're done.
   BattOrFrameHeader frame_header3{0, 0 * sizeof(RawBattOrSample)};
-  RawBattOrSample frame3[] = {};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
-                            CreateFrame(frame_header3, frame3, 0));
+                            CreateFrame(frame_header3, nullptr, 0));
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_NONE, GetCommandError());
   EXPECT_EQ("0.00 -0.3 -0.6\n1.00 0.3 0.6\n2.00 0.9 1.8\n3.00 -0.3 -0.6\n",
             GetTrace());
 }
 
 TEST_F(BattOrAgentTest, StopTracingFailsWithoutConnection) {
   GetAgent()->StopTracing();
   GetTaskRunner()->RunUntilIdle();
@@ skipping 28 matching lines @@
   GetAgent()->OnBytesSent(true);
   GetTaskRunner()->RunUntilIdle();
 
   BattOrFrameHeader cal_frame_header{0, sizeof(RawBattOrSample)};
   RawBattOrSample cal_frame[] = {RawBattOrSample{1, 1}};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
                             CreateFrame(cal_frame_header, cal_frame, 1));
   GetTaskRunner()->RunUntilIdle();
 
   BattOrFrameHeader frame_header{0, 0};
-  RawBattOrSample frame[] = {};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
-                            CreateFrame(frame_header, frame, 0));
+                            CreateFrame(frame_header, nullptr, 0));
   GetTaskRunner()->RunUntilIdle();
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_NONE, GetCommandError());
 }
 
 TEST_F(BattOrAgentTest, StopTracingFailsIfEEPROMReadFails) {
   RunStopTracingTo(BattOrAgentState::EEPROM_REQUEST_SENT);
 
   for (int i = 0; i < 20; i++) {
@@ skipping 31 matching lines @@
   GetAgent()->OnMessageRead(false, BATTOR_MESSAGE_TYPE_SAMPLES, nullptr);
   GetTaskRunner()->RunUntilIdle();
 
   BattOrFrameHeader cal_frame_header{0, sizeof(RawBattOrSample)};
   RawBattOrSample cal_frame[] = {RawBattOrSample{1, 1}};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
                             CreateFrame(cal_frame_header, cal_frame, 1));
   GetTaskRunner()->RunUntilIdle();
 
   BattOrFrameHeader frame_header{0, 0};
-  RawBattOrSample frame[] = {};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
-                            CreateFrame(frame_header, frame, 0));
+                            CreateFrame(frame_header, nullptr, 0));
   GetTaskRunner()->RunUntilIdle();
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_NONE, GetCommandError());
 }
 
 TEST_F(BattOrAgentTest, StopTracingFailsWithManyCalibrationFrameReadFailures) {
   RunStopTracingTo(BattOrAgentState::SAMPLES_REQUEST_SENT);
 
   // We attempt the read a max of 20 times: send that many failures.
   for (int i = 0; i < 20; i++) {
     GetAgent()->OnMessageRead(false, BATTOR_MESSAGE_TYPE_SAMPLES, nullptr);
     GetTaskRunner()->RunUntilIdle();
   }
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_RECEIVE_ERROR, GetCommandError());
 }
 
 TEST_F(BattOrAgentTest, StopTracingSucceedsWithOneDataFrameReadFailure) {
   RunStopTracingTo(BattOrAgentState::CALIBRATION_FRAME_SENT);
 
   // Make a read fail in order to make sure that the agent will retry.
   GetAgent()->OnMessageRead(false, BATTOR_MESSAGE_TYPE_SAMPLES, nullptr);
   GetTaskRunner()->RunUntilIdle();
 
   BattOrFrameHeader frame_header{0, 0};
-  RawBattOrSample frame[] = {};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
-                            CreateFrame(frame_header, frame, 0));
+                            CreateFrame(frame_header, nullptr, 0));
   GetTaskRunner()->RunUntilIdle();
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_NONE, GetCommandError());
 }
 
 TEST_F(BattOrAgentTest, StopTracingFailsWithManyDataFrameReadFailures) {
   RunStopTracingTo(BattOrAgentState::CALIBRATION_FRAME_SENT);
 
   // We attempt the read a max of 20 times: send that many failures.
@@ skipping 21 matching lines @@
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
                             CreateFrame(frame_header1, frame1, 1));
   GetTaskRunner()->RunUntilIdle();
 
   for (int i = 0; i < 11; i++) {
     GetAgent()->OnMessageRead(false, BATTOR_MESSAGE_TYPE_SAMPLES, nullptr);
     GetTaskRunner()->RunUntilIdle();
   }
 
   BattOrFrameHeader frame_header2{0, 0};
-  RawBattOrSample frame2[] = {};
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
-                            CreateFrame(frame_header2, frame2, 0));
+                            CreateFrame(frame_header2, nullptr, 0));
   GetTaskRunner()->RunUntilIdle();
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_NONE, GetCommandError());
 }
 
 TEST_F(BattOrAgentTest, StopTracingFailsIfSamplesReadHasWrongType) {
   RunStopTracingTo(BattOrAgentState::SAMPLES_REQUEST_SENT);
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_CONTROL_ACK,
                             ToCharVector(kInitAck));
@@ skipping 80 matching lines @@
 
   GetAgent()->OnMessageRead(true, BATTOR_MESSAGE_TYPE_SAMPLES,
                             std::move(frame_bytes));
   GetTaskRunner()->RunUntilIdle();
 
   EXPECT_TRUE(IsCommandComplete());
   EXPECT_EQ(BATTOR_ERROR_UNEXPECTED_MESSAGE, GetCommandError());
 }
 
 }  // namespace battor