net cleanup: Remove unnecessary namespace prefixes.

BUG=475208

Review URL: https://codereview.chromium.org/1095823003

Cr-Commit-Position: refs/heads/master@{#326610}

diff --git a/net/http/partial_data.cc b/net/http/partial_data.cc
index 2dcb015..100eed8 100644
--- a/net/http/partial_data.cc
+++ b/net/http/partial_data.cc

@@ -80,7 +80,7 @@
   int rv = entry->GetAvailableRange(
       offset, len, &start_, base::Bind(&PartialData::Core::OnIOComplete,
                                        base::Unretained(this)));
-  if (rv != net::ERR_IO_PENDING) {
+  if (rv != ERR_IO_PENDING) {
     // The callback will not be invoked. Lets cleanup.
     *start = start_;
     delete this;
@@ -429,9 +429,10 @@
                                         resource_size_));
 }
 
-int PartialData::CacheRead(
-    disk_cache::Entry* entry, IOBuffer* data, int data_len,
-    const net::CompletionCallback& callback) {
+int PartialData::CacheRead(disk_cache::Entry* entry,
+                           IOBuffer* data,
+                           int data_len,
+                           const CompletionCallback& callback) {
   int read_len = std::min(data_len, cached_min_len_);
   if (!read_len)
     return 0;
@@ -450,9 +451,10 @@
   return rv;
 }
 
-int PartialData::CacheWrite(
-    disk_cache::Entry* entry, IOBuffer* data, int data_len,
-    const net::CompletionCallback& callback) {
+int PartialData::CacheWrite(disk_cache::Entry* entry,
+                            IOBuffer* data,
+                            int data_len,
+                            const CompletionCallback& callback) {
   DVLOG(3) << "To write: " << data_len;
   if (sparse_entry_) {
     return entry->WriteSparseData(