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

gpu/config/BUILD.gn

Index: gpu/config/BUILD.gn
diff --git a/gpu/config/BUILD.gn b/gpu/config/BUILD.gn
index 6debe2edbc50d62634476d7e063d6443b74da663..a133d44f076f6d5b7e66539d45d417d44e58cacb 100644
--- a/gpu/config/BUILD.gn
+++ b/gpu/config/BUILD.gn
@@ -18,6 +18,13 @@ group("config") {
   }
 }
 
+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.
@@ -69,6 +76,7 @@ source_set("config_sources") {
   ]
 
   deps = [
+    ":crash_keys",
     "//base",
     "//third_party/re2",
     "//ui/gl",