[cast_channel] Make cast_channel related files not depend on "cast_channel.h"

extensions/browser/api/cast_channel/cast_framer_unittest.cc

Index: extensions/browser/api/cast_channel/cast_framer_unittest.cc
diff --git a/extensions/browser/api/cast_channel/cast_framer_unittest.cc b/extensions/browser/api/cast_channel/cast_framer_unittest.cc
index 4000e1a7ab6f3f937d563c71f2757a074b843f0a..87c76e4eeec11e185bb459530b4286c07758bc88 100644
--- a/extensions/browser/api/cast_channel/cast_framer_unittest.cc
+++ b/extensions/browser/api/cast_channel/cast_framer_unittest.cc
@@ -15,6 +15,9 @@
 namespace extensions {
 namespace api {
 namespace cast_channel {
+
+using ::cast_channel::ChannelError;
+
 class CastFramerTest : public testing::Test {
  public:
   CastFramerTest() {}
@@ -54,13 +57,13 @@ TEST_F(CastFramerTest, TestMessageFramerCompleteMessage) {
   // Receive 1 byte of the header, framer demands 3 more bytes.
   EXPECT_EQ(4u, framer_->BytesRequested());
   EXPECT_EQ(nullptr, framer_->Ingest(1, &message_length, &error).get());
-  EXPECT_EQ(cast_channel::CHANNEL_ERROR_NONE, error);
+  EXPECT_EQ(ChannelError::NONE, error);
   EXPECT_EQ(3u, framer_->BytesRequested());
 
   // Ingest remaining 3, expect that the framer has moved on to requesting the
   // body contents.
   EXPECT_EQ(nullptr, framer_->Ingest(3, &message_length, &error).get());
-  EXPECT_EQ(cast_channel::CHANNEL_ERROR_NONE, error);
+  EXPECT_EQ(ChannelError::NONE, error);
   EXPECT_EQ(
       cast_message_str_.size() - MessageFramer::MessageHeader::header_size(),
       framer_->BytesRequested());
@@ -69,7 +72,7 @@ TEST_F(CastFramerTest, TestMessageFramerCompleteMessage) {
   std::unique_ptr<CastMessage> message;
   message = framer_->Ingest(framer_->BytesRequested(), &message_length, &error);
   EXPECT_NE(static_cast<CastMessage*>(nullptr), message.get());
-  EXPECT_EQ(cast_channel::CHANNEL_ERROR_NONE, error);
+  EXPECT_EQ(ChannelError::NONE, error);
   EXPECT_EQ(message->SerializeAsString(), cast_message_.SerializeAsString());
   EXPECT_EQ(4u, framer_->BytesRequested());
   EXPECT_EQ(message->SerializeAsString().size(), message_length);
@@ -97,14 +100,14 @@ TEST_F(CastFramerTest, TestIngestIllegalLargeMessage) {
   ChannelError error;
   EXPECT_EQ(4u, framer_->BytesRequested());
   EXPECT_EQ(nullptr, framer_->Ingest(4, &bytes_ingested, &error).get());
-  EXPECT_EQ(cast_channel::CHANNEL_ERROR_INVALID_MESSAGE, error);
+  EXPECT_EQ(ChannelError::INVALID_MESSAGE, error);
   EXPECT_EQ(0u, framer_->BytesRequested());
 
   // Test that the parser enters a terminal error state.
   WriteToBuffer(cast_message_str_);
   EXPECT_EQ(0u, framer_->BytesRequested());
   EXPECT_EQ(nullptr, framer_->Ingest(4, &bytes_ingested, &error).get());
-  EXPECT_EQ(cast_channel::CHANNEL_ERROR_INVALID_MESSAGE, error);
+  EXPECT_EQ(ChannelError::INVALID_MESSAGE, error);
   EXPECT_EQ(0u, framer_->BytesRequested());
 }
 
@@ -126,14 +129,14 @@ TEST_F(CastFramerTest, TestUnparsableBodyProto) {
   ChannelError error;
   EXPECT_EQ(4u, framer_->BytesRequested());
   EXPECT_EQ(nullptr, framer_->Ingest(4, &message_length, &error).get());
-  EXPECT_EQ(cast_channel::CHANNEL_ERROR_NONE, error);
+  EXPECT_EQ(ChannelError::NONE, error);
   EXPECT_EQ(cast_message_str_.size() - 4, framer_->BytesRequested());
 
   // Send body, expect an error.
   std::unique_ptr<CastMessage> message;
   EXPECT_EQ(nullptr, framer_->Ingest(framer_->BytesRequested(), &message_length,
                                      &error).get());
-  EXPECT_EQ(cast_channel::CHANNEL_ERROR_INVALID_MESSAGE, error);
+  EXPECT_EQ(ChannelError::INVALID_MESSAGE, error);
 }
 }  // namespace cast_channel
 }  // namespace api