base: Remove the string logging from CHECK().

blimp/engine/renderer/blob_channel_sender_proxy.cc

Index: blimp/engine/renderer/blob_channel_sender_proxy.cc
diff --git a/blimp/engine/renderer/blob_channel_sender_proxy.cc b/blimp/engine/renderer/blob_channel_sender_proxy.cc
index ba62580ed3cea401954409d97a9593e268bce5f3..3d200c472702d203241a8ebf0bdabd81691ac008 100644
--- a/blimp/engine/renderer/blob_channel_sender_proxy.cc
+++ b/blimp/engine/renderer/blob_channel_sender_proxy.cc
@@ -19,7 +19,8 @@ mojom::BlobChannelPtr GetConnectedBlobChannel() {
   mojom::BlobChannelPtr blob_channel_ptr;
   content::RenderThread::Get()->GetRemoteInterfaces()->GetInterface(
       &blob_channel_ptr);
-  CHECK(blob_channel_ptr) << "Could not connect to BlobChannel Mojo interface.";
+  // Could not connect to BlobChannel Mojo interface.
+  CHECK(blob_channel_ptr);
   return blob_channel_ptr;
 }
 
@@ -54,8 +55,8 @@ SharedMemoryBlob::~SharedMemoryBlob() {}
 mojo::ScopedSharedBufferHandle SharedMemoryBlob::CreateRemoteHandle() {
   mojo::ScopedSharedBufferHandle remote_handle =
       local_handle_->Clone(mojo::SharedBufferHandle::AccessMode::READ_ONLY);
-  CHECK(remote_handle.is_valid())
-      << "Mojo error when creating read-only buffer handle.";
+  // Mojo error when creating read-only buffer handle.
+  CHECK(remote_handle.is_valid());
   return remote_handle;
 }
 
@@ -93,7 +94,8 @@ void BlobChannelSenderProxy::PutBlob(const BlobId& id, BlobDataPtr data) {
   DCHECK(!IsInEngineCache(id));
 
   size_t size = data->data.size();
-  CHECK(!data->data.empty()) << "Zero length blob sent: " << BlobIdToString(id);
+  // Zero length blob sent.
+  CHECK(!data->data.empty());
 
   replication_state_[id] = false;
   std::unique_ptr<SharedMemoryBlob> shared_mem_blob(