Add GPU fingerprint information to breakpad microdumps.

src/client/linux/microdump_writer/microdump_writer.cc

Index: src/client/linux/microdump_writer/microdump_writer.cc
diff --git a/src/client/linux/microdump_writer/microdump_writer.cc b/src/client/linux/microdump_writer/microdump_writer.cc
index d2eaa6ee69f7ae20f0464716ba571e21810b6fcb..1ec4059018d291e1ead80c94780341604d5a3ca0 100644
--- a/src/client/linux/microdump_writer/microdump_writer.cc
+++ b/src/client/linux/microdump_writer/microdump_writer.cc
@@ -60,6 +60,7 @@ class MicrodumpWriter {
                   const MappingList& mappings,
                   const char* build_fingerprint,
                   const char* product_info,
+                  const char* gpu_fingerprint,
                   LinuxDumper* dumper)
       : ucontext_(context ? &context->context : NULL),
 #if !defined(__ARM_EABI__) && !defined(__mips__)
@@ -69,6 +70,7 @@ class MicrodumpWriter {
         mapping_list_(mappings),
         build_fingerprint_(build_fingerprint),
         product_info_(product_info),
+        gpu_fingerprint_(gpu_fingerprint),
         log_line_(NULL) {
     log_line_ = reinterpret_cast<char*>(Alloc(kLineBufferSize));
     if (log_line_)
@@ -92,6 +94,7 @@ class MicrodumpWriter {
     LogLine("-----BEGIN BREAKPAD MICRODUMP-----");
     DumpProductInformation();
     DumpOSInformation();
+    DumpGPUInformation();
     success = DumpCrashingThread();
     if (success)
       success = DumpMappings();
@@ -212,6 +215,16 @@ class MicrodumpWriter {
     LogCommitLine();
   }
 
+  void DumpGPUInformation() {
+    LogAppend("G ");
+    if (gpu_fingerprint_) {
+      LogAppend(gpu_fingerprint_);
+    } else {
+      LogAppend("UNKNOWN");
+    }
+    LogCommitLine();
+  }
+
   bool DumpThreadStack(uint32_t thread_id,
                        uintptr_t stack_pointer,
                        int max_stack_len,
@@ -392,6 +405,7 @@ class MicrodumpWriter {
   const MappingList& mapping_list_;
   const char* const build_fingerprint_;
   const char* const product_info_;
+  const char* const gpu_fingerprint_;
   char* log_line_;
 };
 }  // namespace
@@ -403,7 +417,8 @@ bool WriteMicrodump(pid_t crashing_process,
                     size_t blob_size,
                     const MappingList& mappings,
                     const char* build_fingerprint,
-                    const char* product_info) {
+                    const char* product_info,
+                    const char* gpu_fingerprint) {
   LinuxPtraceDumper dumper(crashing_process);
   const ExceptionHandler::CrashContext* context = NULL;
   if (blob) {
@@ -416,7 +431,7 @@ bool WriteMicrodump(pid_t crashing_process,
     dumper.set_crash_thread(context->tid);
   }
   MicrodumpWriter writer(context, mappings, build_fingerprint, product_info,
-                         &dumper);
+                         gpu_fingerprint, &dumper);
   if (!writer.Init())
     return false;
   return writer.Dump();