Implemented VLOG() et al.

Implemented VLOG(), VLOG_IF(), VLOG_IS_ON().  Added --v and --vmodule
switches.

Changed some spammy sync-related logs to use VLOG.

BUG=56965
TEST=New unittests

Review URL: http://codereview.chromium.org/3448028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60976 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 22 insertions, 1 deletions

diff --git a/base/logging.cc b/base/logging.cc
index 780da86..a94d5f35 100644
--- a/base/logging.cc
+++ b/base/logging.cc
@@ -51,10 +51,12 @@ typedef pthread_mutex_t* MutexHandle;
 #include "base/process_util.h"
 #include "base/string_piece.h"
 #include "base/utf_string_conversions.h"
+#include "base/vlog.h"
 
 namespace logging {
 
 bool g_enable_dcheck = false;
+VlogInfo* g_vlog_info = NULL;
 
 const char* const log_severity_names[LOG_NUM_SEVERITIES] = {
   "INFO", "WARNING", "ERROR", "ERROR_REPORT", "FATAL" };
@@ -329,8 +331,20 @@ void BaseInitLoggingImpl(const PathChar* new_log_file,
                          LoggingDestination logging_dest,
                          LogLockingState lock_log,
                          OldFileDeletionState delete_old) {
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
   g_enable_dcheck =
-      CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableDCHECK);
+      command_line->HasSwitch(switches::kEnableDCHECK);
+  delete g_vlog_info;
+  g_vlog_info = NULL;
+  // Don't bother initializing g_vlog_info unless we use one of the
+  // vlog switches.
+  if (command_line->HasSwitch(switches::kV) ||
+      command_line->HasSwitch(switches::kVModule)) {
+    g_vlog_info =
+        new VlogInfo(command_line->GetSwitchValueASCII(switches::kV),
+                     command_line->GetSwitchValueASCII(switches::kVModule));
+  }
+
   LoggingLock::Init(lock_log, new_log_file);
 
   LoggingLock logging_lock;
@@ -367,6 +381,13 @@ int GetMinLogLevel() {
   return min_log_level;
 }
 
+int GetVlogLevelHelper(const char* file, size_t N) {
+  DCHECK_GT(N, 0U);
+  return g_vlog_info ?
+      g_vlog_info->GetVlogLevel(base::StringPiece(file, N - 1)) :
+      VlogInfo::kDefaultVlogLevel;
+}
+
 void SetLogFilterPrefix(const char* filter)  {
   if (log_filter_prefix) {
     delete log_filter_prefix;