Update audio code to use size_t more correctly, webrtc/modules/audio_processing/

webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc
index 490db2c646238422e41c8570d6cc35d084944943..367ddb5d3ed035067d404c68b14f9724fe3e13a3 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc
@@ -57,7 +57,7 @@ static_assert(arraysize(kTestCenterFreqs) == arraysize(kTestFilterBank),
               "Test filterbank badly initialized.");
 
 // Target output for gain solving test. Generated with matlab.
-const int kTestStartFreq = 12;  // Lowest integral frequency for ERBs.
+const size_t kTestStartFreq = 12;  // Lowest integral frequency for ERBs.
 const float kTestZeroVar[] = {1.f, 1.f, 1.f, 1.f, 1.f, 1.f, 1.f, 1.f,
                               1.f, 1.f, 1.f, 0.f, 0.f, 0.f, 0.f, 0.f,
                               0.f, 0.f, 0.f, 0.f, 0.f, 0.f};
@@ -161,11 +161,11 @@ TEST_F(IntelligibilityEnhancerTest, TestRenderUpdate) {
 
 // Tests ERB bank creation, comparing against matlab output.
 TEST_F(IntelligibilityEnhancerTest, TestErbCreation) {
-  ASSERT_EQ(static_cast<int>(arraysize(kTestCenterFreqs)), enh_.bank_size_);
-  for (int i = 0; i < enh_.bank_size_; ++i) {
+  ASSERT_EQ(arraysize(kTestCenterFreqs), enh_.bank_size_);
+  for (size_t i = 0; i < enh_.bank_size_; ++i) {
     EXPECT_NEAR(kTestCenterFreqs[i], enh_.center_freqs_[i], kMaxTestError);
-    ASSERT_EQ(static_cast<int>(arraysize(kTestFilterBank[0])), enh_.freqs_);
-    for (int j = 0; j < enh_.freqs_; ++j) {
+    ASSERT_EQ(arraysize(kTestFilterBank[0]), enh_.freqs_);
+    for (size_t j = 0; j < enh_.freqs_; ++j) {
       EXPECT_NEAR(kTestFilterBank[i][j], enh_.filter_bank_[i][j],
                   kMaxTestError);
     }
@@ -178,26 +178,26 @@ TEST_F(IntelligibilityEnhancerTest, TestSolveForGains) {
   ASSERT_EQ(kTestStartFreq, enh_.start_freq_);
   vector<float> sols(enh_.bank_size_);
   float lambda = -0.001f;
-  for (int i = 0; i < enh_.bank_size_; i++) {
+  for (size_t i = 0; i < enh_.bank_size_; i++) {
     enh_.filtered_clear_var_[i] = 0.0f;
     enh_.filtered_noise_var_[i] = 0.0f;
     enh_.rho_[i] = 0.02f;
   }
   enh_.SolveForGainsGivenLambda(lambda, enh_.start_freq_, &sols[0]);
-  for (int i = 0; i < enh_.bank_size_; i++) {
+  for (size_t i = 0; i < enh_.bank_size_; i++) {
     EXPECT_NEAR(kTestZeroVar[i], sols[i], kMaxTestError);
   }
-  for (int i = 0; i < enh_.bank_size_; i++) {
+  for (size_t i = 0; i < enh_.bank_size_; i++) {
     enh_.filtered_clear_var_[i] = static_cast<float>(i + 1);
     enh_.filtered_noise_var_[i] = static_cast<float>(enh_.bank_size_ - i);
   }
   enh_.SolveForGainsGivenLambda(lambda, enh_.start_freq_, &sols[0]);
-  for (int i = 0; i < enh_.bank_size_; i++) {
+  for (size_t i = 0; i < enh_.bank_size_; i++) {
     EXPECT_NEAR(kTestNonZeroVarLambdaTop[i], sols[i], kMaxTestError);
   }
   lambda = -1.0;
   enh_.SolveForGainsGivenLambda(lambda, enh_.start_freq_, &sols[0]);
-  for (int i = 0; i < enh_.bank_size_; i++) {
+  for (size_t i = 0; i < enh_.bank_size_; i++) {
     EXPECT_NEAR(kTestZeroVar[i], sols[i], kMaxTestError);
   }
 }