Static initializers: Remove <iostream> include from GPU logging system.

GPU can't rely on base because of nacl so it has its own logger. The logger
includes <iostream> in the header, so most gles2 and command buffer files have
std::__ioinit static initializers. Create a common logging.cc which has a
simple method that just returns std::cerr so all the __ioinits collapse down to
one.

BUG=94794
TEST=compiles
R=apatrick
TBR=noelallen

Review URL: http://codereview.chromium.org/7821004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99229 0039d316-1c4b-4281-b951-d872f2087c98

gpu/command_buffer/common/logging.cc

@@ -0,0 +1,24 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gpu/command_buffer/common/logging.h"
+
+#include <iostream>
+
+namespace gpu {
+
+std::ostream& Logger::stream() {
+  return std::cerr;
+}
+
+Logger::~Logger() {
+  if (!condition_) {
+    std::cerr << std::endl;
+    std::cerr.flush();
+    if (level_ == FATAL)
+      assert(false);
+  }
+}
+
+}  // namespace gpu

gpu/command_buffer/common/logging.h

@@ -7,7 +7,7 @@
 
 #include <assert.h>
 
-#include <iostream>
+#include <ostream>
 
 // Windows defines an ERROR macro.
 #ifdef ERROR
@@ -132,19 +132,17 @@ class Logger {
         << y_name << "(" << y << ")) failed. ";
   }
 
-  ~Logger() {
-    if (!condition_) {
-      std::cerr << std::endl;
-      std::cerr.flush();
-      if (level_ == FATAL)
-        assert(false);
-    }
-  }
+  // Retrieves the stream that we write to. This header cannot depend on
+  // <iostream> because that will add static initializers to all files that
+  // include this header.
+  std::ostream& stream();
+
+  ~Logger();
 
   template <typename T>
   Logger& operator<<(const T& value) {
     if (!condition_)
-      std::cerr << value;
+      stream() << value;
     return *this;
   }
 

gpu/gpu.gyp

@@ -59,6 +59,7 @@
         'command_buffer/common/gles2_cmd_utils.h',
         'command_buffer/common/id_allocator.cc',
         'command_buffer/common/id_allocator.h',
+        'command_buffer/common/logging.cc',
         'command_buffer/common/logging.h',
         'command_buffer/common/thread_local.h',
         'command_buffer/common/types.h',

ppapi/native_client/src/shared/ppapi_proxy/nacl.scons

@@ -88,6 +88,8 @@ command_buffer_common_srcs = [
     'command_buffer/common/cmd_buffer_common.cc',
     'command_buffer/common/gles2_cmd_format.cc',
     'command_buffer/common/gles2_cmd_utils.cc',
+    'command_buffer/common/logging.cc',
+    'command_buffer/common/logging.h',
     ]
 
 command_buffer_client_srcs = [