Update the tcmalloc vendor branch to r144 (gperftools 2.0), and README.chromium.

third_party/tcmalloc/README.chromium

 Name: tcmalloc
-Short Name: google-perftools
-URL: http://google-perftools.googlecode.com/
+Short Name: gperftools
+URL: http://gperftools.googlecode.com/
 Version: unknown
 Revision: 144
 Security Critical: yes
 
 Description:
 This contains Chromium's locally patched copy of tcmalloc.
 
 Contents:
 
   chromium/
 
     The chromium patched sources, copied from the vendor/
     subdirectory and containing our local modifications.
 
     We only copy over the vendor/src/ subdirectory (the only piece
     we need) but still leave it in a chromium/src/ subdirectory to
     keep the directory structures in parallel.
 
   vendor/
 
     Vanilla sources from upstream:
 
-      http://google-perftools.googlecode.com/svn/trunk
+      http://gperftools.googlecode.com/svn/trunk
 
     The current revision is:
 
-      Last Changed Rev: 111
-      Last Changed Date: 2011-07-16 05:07:10 +0400 (Sat, 16 Jul 2011)
+      Last Changed Rev: 144
+      Last Changed Date: 2012-02-04 00:10:11 +0000 (Sat, 04 Feb 2012)
 
 
 
 HOWTOs:
 
   Take a new version from upstream:
 
     1)  Grab the revision:
 
         $ svn export [-r {tcmalloc-rev}] \
-          http://google-perftools.googlecode.com/svn/trunk \
+          http://gperftools.googlecode.com/svn/trunk \
           vendor-{tcmalloc-rev}
 
     2)  Check for added or deleted files:
 
         $ diff -q -r -x .svn vendor vendor-{tcmalloc-rev}
 
     3)  Copy the new revision on top of the checked-in vendor branch:
 
         $ cp -r vendor-{tcmalloc-rev}/* vendor
 
         C:\> xcopy /e/y/i vendor-{tcmalloc-rev}\* vendor
 
-    4)  "svn add" or "svn rm" added or removed files (based on your
+    4)  Make all vendor files non-executable.
+
+        $ find . -executable -type f -exec chmod a-x {} \;
+
+    5)  "svn add" or "svn rm" added or removed files (based on your
         "diff -q -r" output from above)
 
-    5)  Create the CL, upload, check it in:
+    6)  Create the CL, upload, check it in:
 
         $ gcl change CL
         $ gcl upload CL
         $ gcl commit CL
 
         Note the revision number since you're going to want to merge
         that to the local chromium branch.
 
   Merge a new upstream version with our local patched copy:
 
     1)  Merge the local revision to chromium/src
 
         $ svn merge -c {chrome-rev} svn://chrome-svn/chrome/trunk/src/third_party/tcmalloc/vendor/src chromium/src
 
     2)  Resolve any conflicts
 
     3)  Create the CL, upload, check in:
 
         $ gcl change CL
         $ gcl upload CL
         $ gcl commit CL