Replace NULL with nullptr in all C++ files.

webrtc/modules/video_capture/windows/help_functions_ds.cc

Index: webrtc/modules/video_capture/windows/help_functions_ds.cc
diff --git a/webrtc/modules/video_capture/windows/help_functions_ds.cc b/webrtc/modules/video_capture/windows/help_functions_ds.cc
index 057bffb0af15c3f0832477cfaa3efa638f98de08..d3d1d1787e5f4ef93248b6f283975545e2fe767b 100644
--- a/webrtc/modules/video_capture/windows/help_functions_ds.cc
+++ b/webrtc/modules/video_capture/windows/help_functions_ds.cc
@@ -35,78 +35,73 @@ LONGLONG GetMaxOfFrameArray(LONGLONG *maxFps, long size)
 IPin* GetInputPin(IBaseFilter* filter)
 {
     HRESULT hr;
-    IPin* pin = NULL;
-    IEnumPins* pPinEnum = NULL;
+    IPin* pin = nullptr;
+    IEnumPins* pPinEnum = nullptr;
     filter->EnumPins(&pPinEnum);
-    if (pPinEnum == NULL)
-    {
-        return NULL;
+    if (pPinEnum == nullptr) {
+      return nullptr;
     }
 
     // get first unconnected pin
     hr = pPinEnum->Reset(); // set to first pin
 
-    while (S_OK == pPinEnum->Next(1, &pin, NULL))
-    {
-        PIN_DIRECTION pPinDir;
-        pin->QueryDirection(&pPinDir);
-        if (PINDIR_INPUT == pPinDir) // This is an input pin
+    while (S_OK == pPinEnum->Next(1, &pin, nullptr)) {
+      PIN_DIRECTION pPinDir;
+      pin->QueryDirection(&pPinDir);
+      if (PINDIR_INPUT == pPinDir)  // This is an input pin
+      {
+        IPin* tempPin = nullptr;
+        if (S_OK != pin->ConnectedTo(&tempPin))  // The pint is not connected
         {
-            IPin* tempPin = NULL;
-            if (S_OK != pin->ConnectedTo(&tempPin)) // The pint is not connected
-            {
-                pPinEnum->Release();
-                return pin;
-            }
+          pPinEnum->Release();
+          return pin;
         }
-        pin->Release();
+      }
+      pin->Release();
     }
     pPinEnum->Release();
-    return NULL;
+    return nullptr;
 }
 
 IPin* GetOutputPin(IBaseFilter* filter, REFGUID Category)
 {
     HRESULT hr;
-    IPin* pin = NULL;
-    IEnumPins* pPinEnum = NULL;
+    IPin* pin = nullptr;
+    IEnumPins* pPinEnum = nullptr;
     filter->EnumPins(&pPinEnum);
-    if (pPinEnum == NULL)
-    {
-        return NULL;
+    if (pPinEnum == nullptr) {
+      return nullptr;
     }
     // get first unconnected pin
     hr = pPinEnum->Reset(); // set to first pin
-    while (S_OK == pPinEnum->Next(1, &pin, NULL))
-    {
-        PIN_DIRECTION pPinDir;
-        pin->QueryDirection(&pPinDir);
-        if (PINDIR_OUTPUT == pPinDir) // This is an output pin
-        {
-            if (Category == GUID_NULL || PinMatchesCategory(pin, Category))
-            {
-                pPinEnum->Release();
-                return pin;
-            }
+    while (S_OK == pPinEnum->Next(1, &pin, nullptr)) {
+      PIN_DIRECTION pPinDir;
+      pin->QueryDirection(&pPinDir);
+      if (PINDIR_OUTPUT == pPinDir)  // This is an output pin
+      {
+        if (Category == GUID_NULL || PinMatchesCategory(pin, Category)) {
+          pPinEnum->Release();
+          return pin;
         }
-        pin->Release();
-        pin = NULL;
+      }
+      pin->Release();
+      pin = nullptr;
     }
     pPinEnum->Release();
-    return NULL;
+    return nullptr;
 }
 
 BOOL PinMatchesCategory(IPin *pPin, REFGUID Category)
 {
     BOOL bFound = FALSE;
-    IKsPropertySet *pKs = NULL;
+    IKsPropertySet* pKs = nullptr;
     HRESULT hr = pPin->QueryInterface(IID_PPV_ARGS(&pKs));
     if (SUCCEEDED(hr))
     {
         GUID PinCategory;
         DWORD cbReturned;
-        hr = pKs->Get(AMPROPSETID_Pin, AMPROPERTY_PIN_CATEGORY, NULL, 0, &PinCategory,
-                      sizeof(GUID), &cbReturned);
+        hr = pKs->Get(AMPROPSETID_Pin, AMPROPERTY_PIN_CATEGORY, nullptr, 0,
+                      &PinCategory, sizeof(GUID), &cbReturned);
         if (SUCCEEDED(hr) && (cbReturned == sizeof(GUID)))
         {
             bFound = (PinCategory == Category);