gpu: Add a util method to set crash-keys from a GPUInfo.

gpu/config/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/ui.gni")
 
 group("config") {
   if (is_component_build) {
     public_deps = [
       "//gpu",
     ]
   } else {
     public_deps = [
       ":config_sources",
     ]
   }
 }
 
+source_set("crash_keys") {

[Nico, 2017/03/23 12:43:45]

add a comment that this is linked into both chrome.exe and chrome.dll and must
be small (and hence 

[sadrul, 2017/03/23 14:45:22]

Done.

+  sources = [
+    "gpu_crash_keys.cc",
+    "gpu_crash_keys.h",
+  ]
+}
+
 source_set("config_sources") {
   # External code should depend on this via //gpu/config above rather than
   # depending on this directly or the component build will break.
   visibility = [ "//gpu/*" ]
 
   sources = [
     "dx_diag_node.cc",
     "dx_diag_node.h",
     "gpu_blacklist.cc",
     "gpu_blacklist.h",
@@ skipping 31 matching lines @@
     "software_rendering_list_json.cc",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
     "//gpu:gpu_implementation",
   ]
 
   deps = [
+    ":crash_keys",
     "//base",
     "//third_party/re2",
     "//ui/gl",
     "//ui/gl/init",
   ]
 
   # Prefer mesa GL headers to system headers, which cause problems on Win.
   include_dirs = [ "//third_party/mesa/src/include" ]
 
   if (is_win) {
@@ skipping 13 matching lines @@
   if (is_linux) {
     deps += [ "//third_party/angle:angle_gpu_info_util" ]
   }
   if (is_mac) {
     libs = [
       "IOKit.framework",
       "CoreFoundation.framework",
     ]
   }
 }