Simple trace logging of received IPC messages

Adds an entry to chrome://tracing for processing IPC messages that includes either the IPC message type ID (which can be matched to a name with the ipclist tool), or in DEBUG builds (or other builds where IPC_MESSAGE_LOG_ENABLED has been set), the message name.

Also updates ipclist to not expect to see content shell messages, and clarifies some comments around cases where message classes are used entirely outside of chrome itself.

Identical re-submit of http://codereview.chromium.org/9389020/ which somehow
triggered a Windows linker bug (unexpected error LNK1000).

BUG=79942
TBR=jam@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9360052

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@121921 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 10 insertions, 3 deletions

diff --git a/chrome/tools/ipclist/ipclist.cc b/chrome/tools/ipclist/ipclist.cc
index 9a2faab..419a05b 100644
--- a/chrome/tools/ipclist/ipclist.cc
+++ b/chrome/tools/ipclist/ipclist.cc
@@ -38,10 +38,11 @@ static bool check_msgtable() {
   int highest_class_id = 0;
   std::vector<int> exemptions;
 
-  // Exclude test files from consideration.  Do not include message
-  // files used inside the actual chrome browser in this list.
+  // Exclude test and other non-browser files from consideration.  Do not
+  // include message files used inside the actual chrome browser in this list.
   exemptions.push_back(TestMsgStart);
   exemptions.push_back(FirefoxImporterUnittestMsgStart);
+  exemptions.push_back(ShellMsgStart);
 
   for (size_t i = 0; i < MSGTABLE_SIZE; ++i) {
     int class_id = IPC_MESSAGE_ID_CLASS(msgtable[i].id);
@@ -64,9 +65,15 @@ static bool check_msgtable() {
       highest_class_id = class_id;
   }
 
-  if (LastIPCMsgStart > highest_class_id + 1) {
+  while (LastIPCMsgStart > highest_class_id + 1) {
+    std::vector<int>::iterator iter;
+    iter = find(exemptions.begin(), exemptions.end(), highest_class_id+1);
+    if (iter == exemptions.end()) {
       std::cout << "Missing message file: gap before LastIPCMsgStart\n";
       result = false;
+      break;
+    }
+    ++highest_class_id;
   }
 
   if (!result)