Fix cpplint errors in locations that are already being checked

Otherwise cpplint will trigger during presubmit for unrelated changes
in these files.

BUG=webrtc:5149
NOTRY=True

Review-Url: https://codereview.webrtc.org/2767393003
Cr-Commit-Position: refs/heads/master@{#17371}

webrtc/common_video/h264/profile_level_id.cc

@@ -47,7 +47,7 @@ constexpr uint8_t ByteMaskString(char c, const char (&str)[9]) {
 // either 0 or 1.
 class BitPattern {
  public:
-  constexpr BitPattern(const char (&str)[9])
+  explicit constexpr BitPattern(const char (&str)[9])
       : mask_(~ByteMaskString('x', str)),
         masked_value_(ByteMaskString('1', str)) {}
 

webrtc/modules/rtp_rtcp/source/rtp_packet_history.cc

@@ -12,6 +12,7 @@
 
 #include <algorithm>
 #include <limits>
+#include <utility>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"

webrtc/modules/rtp_rtcp/source/rtp_packet_history_unittest.cc

@@ -11,6 +11,7 @@
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_history.h"
 
 #include <memory>
+#include <utility>
 
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h"

webrtc/modules/video_coding/jitter_estimator_tests.cc

@@ -46,7 +46,8 @@ class TestVCMJitterEstimator : public ::testing::Test {
 // Generates some simple test data in the form of a sawtooth wave.
 class ValueGenerator {
  public:
-  ValueGenerator(int32_t amplitude) : amplitude_(amplitude), counter_(0) {}
+  explicit ValueGenerator(int32_t amplitude)
+      : amplitude_(amplitude), counter_(0) {}
   virtual ~ValueGenerator() {}
 
   int64_t Delay() { return ((counter_ % 11) - 5) * amplitude_; }
@@ -157,4 +158,4 @@ TEST_F(TestVCMJitterEstimator, TestConvergence) {
   EXPECT_NE(low_rate_iterations, 0);
   EXPECT_LE(low_rate_iterations, regular_iterations);
 }
-}
+}  // namespace webrtc