Add RTC_ prefix to (D)CHECKs and related macros.

We must remove dependency on Chromium, i.e. we can't use Chromium's base/logging.h. That means we need to define these macros in WebRTC also when doing Chromium builds. And this causes redefinition.

Alternative solutions:
* Check if we already have defined e.g. CHECK, and don't define them in that case. This makes us depend on include order in Chromium, which is not acceptable.
* Don't allow using the macros in WebRTC headers. Error prone since if someone adds it there by mistake it may compile fine, but later break if a header in added or order is changed in Chromium. That will be confusing and hard to enforce.
* Ensure that headers that are included by an embedder don't include our macros. This would require some heavy refactoring to be maintainable and enforcable.
* Changes in Chromium for this is obviously not an option.

BUG=chromium:468375
NOTRY=true

Review URL: https://codereview.webrtc.org/1335923002

Cr-Original-Commit-Position: refs/heads/master@{#9964}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 91d6edef35e7275879c30ce16ecb8b6dc73c6e4a
diff --git a/common_audio/resampler/push_sinc_resampler.cc b/common_audio/resampler/push_sinc_resampler.cc
index 72ed56b..a740423 100644
--- a/common_audio/resampler/push_sinc_resampler.cc
+++ b/common_audio/resampler/push_sinc_resampler.cc
@@ -50,8 +50,8 @@
                                    size_t source_length,
                                    float* destination,
                                    size_t destination_capacity) {
-  CHECK_EQ(source_length, resampler_->request_frames());
-  CHECK_GE(destination_capacity, destination_frames_);
+  RTC_CHECK_EQ(source_length, resampler_->request_frames());
+  RTC_CHECK_GE(destination_capacity, destination_frames_);
   // Cache the source pointer. Calling Resample() will immediately trigger
   // the Run() callback whereupon we provide the cached value.
   source_ptr_ = source;
@@ -81,7 +81,7 @@
 void PushSincResampler::Run(size_t frames, float* destination) {
   // Ensure we are only asked for the available samples. This would fail if
   // Run() was triggered more than once per Resample() call.
-  CHECK_EQ(source_available_, frames);
+  RTC_CHECK_EQ(source_available_, frames);
 
   if (first_pass_) {
     // Provide dummy input on the first pass, the output of which will be