Change rtc::TimeNanos and rtc::TimeMicros return value from uint64_t to int64_t.

webrtc/modules/video_capture/test/video_capture_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 454 matching lines @@
 }
 
 // Test frame rate and no picture alarm.
 // Flaky on Win32, see webrtc:3270.
 #if defined(WEBRTC_WIN) || defined(WEBRTC_MAC)
 #define MAYBE_FrameRate DISABLED_FrameRate
 #else
 #define MAYBE_FrameRate FrameRate
 #endif
 TEST_F(VideoCaptureExternalTest, MAYBE_FrameRate) {
-  uint64_t testTime = 3 * rtc::kNumNanosecsPerSec;
-  uint64_t startTime = rtc::TimeNanos();
+  int64_t testTime = 3 * rtc::kNumNanosecsPerSec;
+  int64_t startTime = rtc::TimeNanos();
 
   while ((rtc::TimeNanos() - startTime) < testTime) {
     size_t length = webrtc::CalcBufferSize(webrtc::kI420,
                                            test_frame_->width(),
                                            test_frame_->height());
     std::unique_ptr<uint8_t[]> test_buffer(new uint8_t[length]);
     webrtc::ExtractBuffer(*test_frame_, length, test_buffer.get());
     EXPECT_EQ(
         0, capture_input_interface_->IncomingFrame(
                test_buffer.get(), length, capture_callback_.capability(), 0));
@@ skipping 37 matching lines @@
     length, capture_callback_.capability(), 0));
   EXPECT_EQ(0, capture_module_->SetCaptureRotation(webrtc::kVideoRotation_180));
   capture_callback_.SetExpectedCaptureRotation(webrtc::kVideoRotation_180);
   EXPECT_EQ(0, capture_input_interface_->IncomingFrame(test_buffer.get(),
     length, capture_callback_.capability(), 0));
   EXPECT_EQ(0, capture_module_->SetCaptureRotation(webrtc::kVideoRotation_270));
   capture_callback_.SetExpectedCaptureRotation(webrtc::kVideoRotation_270);
   EXPECT_EQ(0, capture_input_interface_->IncomingFrame(test_buffer.get(),
     length, capture_callback_.capability(), 0));
 }