Extend the IOBuffer to the disk cache.

net/http/http_cache_unittest.cc

Index: net/http/http_cache_unittest.cc
===================================================================
--- net/http/http_cache_unittest.cc	(revision 9323)
+++ net/http/http_cache_unittest.cc	(working copy)
@@ -65,7 +65,7 @@
     return static_cast<int32>(data_[index].size());
   }
 
-  virtual int ReadData(int index, int offset, char* buf, int buf_len,
+  virtual int ReadData(int index, int offset, net::IOBuffer* buf, int buf_len,
                        net::CompletionCallback* callback) {
     DCHECK(index >= 0 && index < 2);
 
@@ -75,7 +75,7 @@
       return 0;
 
     int num = std::min(buf_len, static_cast<int>(data_[index].size()) - offset);
-    memcpy(buf, &data_[index][offset], num);
+    memcpy(buf->data(), &data_[index][offset], num);
 
     if (!callback || (test_mode_ & TEST_MODE_SYNC_CACHE_READ))
       return num;
@@ -84,7 +84,7 @@
     return net::ERR_IO_PENDING;
   }
 
-  virtual int WriteData(int index, int offset, const char* buf, int buf_len,
+  virtual int WriteData(int index, int offset, net::IOBuffer* buf, int buf_len,
                         net::CompletionCallback* callback, bool truncate) {
     DCHECK(index >= 0 && index < 2);
     DCHECK(truncate);
@@ -94,7 +94,7 @@
 
     data_[index].resize(offset + buf_len);
     if (buf_len)
-      memcpy(&data_[index][offset], buf, buf_len);
+      memcpy(&data_[index][offset], buf->data(), buf_len);
     return buf_len;
   }