Delete or update left-over ASSERT use and comments.

BUG=webrtc:6424,webrtc:6323

Review-Url: https://codereview.webrtc.org/2647663002
Cr-Commit-Position: refs/heads/master@{#16215}

webrtc/base/BUILD.gn

@@ -665,12 +665,6 @@ rtc_static_library("rtc_base") {
       "unixfilesystem.cc",
       "unixfilesystem.h",
     ]
-    if (is_debug) {
-      # The Chromium build/common.gypi defines this for all posix
-      # _except_ for ios & mac.  We want it there as well, e.g.
-      # because ASSERT and friends trigger off of it.
-      defines += [ "_DEBUG" ]
-    }
   }
 
   if (is_nacl) {

webrtc/base/fileutils.h

@@ -92,12 +92,12 @@ class FilesystemInterface {
                                const std::string &mode) = 0;
 
   // This will attempt to delete the path located at filename.
-  // It ASSERTS and returns false if the path points to a folder or a
+  // It DCHECKs and returns false if the path points to a folder or a
   // non-existent file.
   virtual bool DeleteFile(const Pathname &filename) = 0;
 
   // This will attempt to delete the empty folder located at 'folder'
-  // It ASSERTS and returns false if the path points to a file or a non-existent
+  // It DCHECKs and returns false if the path points to a file or a non-existent
   // folder. It fails normally if the folder is not empty or can otherwise
   // not be deleted.
   virtual bool DeleteEmptyFolder(const Pathname &folder) = 0;
@@ -116,13 +116,13 @@ class FilesystemInterface {
   virtual bool CreateFolder(const Pathname &pathname) = 0;
 
   // This moves a file from old_path to new_path, where "old_path" is a
-  // plain file. This ASSERTs and returns false if old_path points to a
+  // plain file. This DCHECKs and returns false if old_path points to a
   // directory, and returns true if the function succeeds.
   // If the new path is on a different volume than the old path, this function
   // will attempt to copy and, if that succeeds, delete the old path.
   virtual bool MoveFile(const Pathname &old_path, const Pathname &new_path) = 0;
 
-  // This copies a file from old_path to new_path. This method ASSERTs and
+  // This copies a file from old_path to new_path. This method DCHECKs and
   // returns false if old_path is a folder, and returns true if the copy
   // succeeds.
   virtual bool CopyFile(const Pathname &old_path, const Pathname &new_path) = 0;

webrtc/base/unixfilesystem.h

@@ -44,7 +44,7 @@ class UnixFilesystem : public FilesystemInterface {
   bool DeleteFile(const Pathname& filename) override;
 
   // This will attempt to delete the folder located at 'folder'
-  // It ASSERTs and returns false if you pass it a non-existant folder or a
+  // It DCHECKs and returns false if you pass it a non-existant folder or a
   // plain file.
   bool DeleteEmptyFolder(const Pathname& folder) override;
 

webrtc/media/engine/webrtcvoiceengine.cc

@@ -496,7 +496,7 @@ class WebRtcVoiceCodecs final {
   // codec.
   static void MaybeFixupG722(webrtc::CodecInst* voe_codec, int new_plfreq) {
     if (IsCodec(*voe_codec, kG722CodecName)) {
-      // If the ASSERT triggers, the codec definition in WebRTC VoiceEngine
+      // If the DCHECK triggers, the codec definition in WebRTC VoiceEngine
       // has changed, and this special case is no longer needed.
       RTC_DCHECK(voe_codec->plfreq != new_plfreq);
       voe_codec->plfreq = new_plfreq;

webrtc/modules/video_capture/windows/sink_filter_ds.cc

@@ -319,8 +319,8 @@ CaptureInputPin::Receive ( IN IMediaSample * pIMediaSample )
 {
     HRESULT hr = S_OK;
 
-    ASSERT (m_pFilter);
-    ASSERT (pIMediaSample);
+    RTC_DCHECK(m_pFilter);
+    RTC_DCHECK(pIMediaSample);
 
     // get the thread handle of the delivering thread inc its priority
     if( _threadHandle == NULL)