Add CHECK's for debugging.

Add CHECK's to STreamTextureFactory and StreamTextureHostAndroid to
debug - https://bugs.chromium.org/p/chromium/issues/detail?id=984309.

Bug: 984309
Change-Id: I6c63bb6ee0e595e06c1368babb06966bea0238c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1729832Reviewed-by: Stefan Zager <szager@chromium.org>
Reviewed-by: Eric Karl <ericrk@chromium.org>
Reviewed-by: Frank Liberato <liberato@chromium.org>
Commit-Queue: vikas soni <vikassoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683265}

content/renderer/media/android/stream_texture_factory.cc

@@ -77,9 +77,12 @@ void StreamTextureProxy::CreateSharedImage(
     const gfx::Size& size,
     gpu::Mailbox* mailbox,
     gpu::SyncToken* unverified_sync_token) {
+  // TODO(vikassoni): Remove CHECK after debugging.
+  CHECK(host_);
   *mailbox = host_->CreateSharedImage(size);
   if (!mailbox)
     return;
+  CHECK(host_);
   *unverified_sync_token = host_->GenUnverifiedSyncToken();
 }
 

content/renderer/stream_texture_host_android.cc

@@ -85,6 +85,9 @@ gpu::Mailbox StreamTextureHost::CreateSharedImage(const gfx::Size& size) {
 }
 
 gpu::SyncToken StreamTextureHost::GenUnverifiedSyncToken() {
+  // TODO(vikassoni): Remove CHECK after debugging.
+  CHECK(channel_);
+
   return gpu::SyncToken(gpu::CommandBufferNamespace::GPU_IO,
                         gpu::CommandBufferIdFromChannelAndRoute(
                             channel_->channel_id(), route_id_),