Use a valid /prefetch argument when launching a process.

components/crash/content/app/crashpad_win.cc

Index: components/crash/content/app/crashpad_win.cc
diff --git a/components/crash/content/app/crashpad_win.cc b/components/crash/content/app/crashpad_win.cc
index 1628ab6a9d5cbfc1f8945e24cdee952fea8f4a2c..b3a4e97dd6f69baae9b1bc735746c6ad9004f260 100644
--- a/components/crash/content/app/crashpad_win.cc
+++ b/components/crash/content/app/crashpad_win.cc
@@ -84,6 +84,10 @@ base::FilePath PlatformCrashpadInitialization(bool initial_client,
       exe_file = exe_dir.Append(FILE_PATH_LITERAL("crashpad_handler.exe"));
     } else {
       arguments.push_back("--type=crashpad-handler");
+
+      // Add a prefetch argument to avoid polluting the prefetch profile of the
+      // browser process.
+      arguments.push_back("/prefetch:8");

[gab, 2016/01/26 21:40:26]

I hate having to use hardcoded strings, why can't this one refer to the constant
like other components do?

At least add a comment reference to kPrefetchArgumentOther?

[fdoray, 2016/01/27 20:12:19]

Done. I was scared of adding the crashpad->content_common dependency. We'll see
what the owners think about it :) I can't add a crashpad->static_switches
dependency, because I get "symbols defined multiple times" errors when crashpad
is linked with targets that already depend on content_common.

[fdoray, 2016/01/28 22:11:06]

Unfortunately, I can't use the constant here.
- The constant is defined in //content/public/common and
//content/public/common:static_switches. 
- //components/html_viewer depends on crashpad and
//content/public/common:static_switches -> symbols defined multiple times if
crashpad depends on //content/public/common
- //chrome/browser depends on crashpad and //content/public/common -> symbols
defined multiple times if crashpad depends on
//content/public/common:static_switches

     }
 
     // TODO(scottmg): See https://crashpad.chromium.org/bug/23.