Blimp: Add BlobChannel Helium messages and delegate impls.

blimp/common/blob_cache/in_memory_blob_cache_unittest.cc

Index: blimp/common/blob_cache/in_memory_blob_cache_unittest.cc
diff --git a/blimp/common/blob_cache/in_memory_blob_cache_unittest.cc b/blimp/common/blob_cache/in_memory_blob_cache_unittest.cc
index 6eb98ff6c4aa39387418505dde296dedbe9f8822..9cc24d71d13e4b88a0422677d63b54040f8c749a 100644
--- a/blimp/common/blob_cache/in_memory_blob_cache_unittest.cc
+++ b/blimp/common/blob_cache/in_memory_blob_cache_unittest.cc
@@ -11,6 +11,7 @@
 #include "base/memory/ref_counted.h"
 #include "blimp/common/blob_cache/blob_cache.h"
 #include "blimp/common/blob_cache/in_memory_blob_cache.h"
+#include "blimp/common/blob_cache/test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blimp {
@@ -21,10 +22,6 @@ const char kBar[] = "bar";
 const char kDeadbeef[] = "\xde\xad\xbe\xef";
 const char kForbiddenCode[] = "\x4b\x1d\xc0\xd3";
 
-BlobDataPtr CreateBlobDataPtr(const std::string& data) {
-  return new BlobData(data);
-}
-
 class InMemoryBlobCacheTest : public testing::Test {
  public:
   InMemoryBlobCacheTest() {}