Roll breakpad r1387 -> r1388 for breakpad microdumps.

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of 'src').
 #
@@ skipping 82 matching lines @@
 # Only these hosts are allowed for dependencies in this DEPS file.
 # If you need to add a new host, contact chrome infrastracture team.
 allowed_hosts = [
   'chromium.googlesource.com',
   'boringssl.googlesource.com',
   'pdfium.googlesource.com',
 ]
 
 deps = {
   'src/breakpad/src':
-   Var('chromium_git') + '/external/google-breakpad/src.git' + '@' + '35189355da4b65ed5e7692f790c240a9ab347731', # from svn revision 1387
+   Var('chromium_git') + '/external/google-breakpad/src.git' + '@' + 'e15ba2c4d7d3b10c8c2818aa14ab66ad9a383ff6', # from svn revision 1388
 
   'src/buildtools':
    Var('chromium_git') + '/chromium/buildtools.git' + '@' +  Var('buildtools_revision'),
 
   'src/sdch/open-vcdiff':
    Var('chromium_git') + '/external/open-vcdiff.git' + '@' + '438f2a5be6d809bc21611a94cd37bfc8c28ceb33', # from svn revision 41
 
   'src/testing/gtest':
    Var('chromium_git') + '/external/googletest.git' + '@' + '4650552ff637bb44ecf7784060091cbed3252211', # from svn revision 692
 
@@ skipping 677 matching lines @@
     # corresponding .py files have already been deleted.
     'name': 'remove_stale_pyc_files',
     'pattern': 'src/tools/.*\\.py',
     'action': [
         'python',
         'src/tools/remove_stale_pyc_files.py',
         'src/tools',
     ],
   },
 ]