Revert of Crashpad Windows: Use the Crashpad client instead of Breakpad on Windows

chrome/common/child_process_logging_win.cc

Index: chrome/common/child_process_logging_win.cc
diff --git a/chrome/common/child_process_logging_win.cc b/chrome/common/child_process_logging_win.cc
index 4e3177cec6167aac14f89db2223c82cd47757977..9571701ed575f00917369c59d71a358ed1552c17 100644
--- a/chrome/common/child_process_logging_win.cc
+++ b/chrome/common/child_process_logging_win.cc
@@ -16,7 +16,57 @@
 
 namespace child_process_logging {
 
+namespace {
+
+// exported in breakpad_win.cc:
+//    void __declspec(dllexport) __cdecl SetCrashKeyValueImpl.
+typedef void (__cdecl *SetCrashKeyValue)(const wchar_t*, const wchar_t*);
+
+// exported in breakpad_win.cc:
+//    void __declspec(dllexport) __cdecl ClearCrashKeyValueImpl.
+typedef void (__cdecl *ClearCrashKeyValue)(const wchar_t*);
+
+void SetCrashKeyValueTrampoline(const base::StringPiece& key,
+                                const base::StringPiece& value) {
+  static SetCrashKeyValue set_crash_key = NULL;
+  if (!set_crash_key) {
+    HMODULE exe_module = GetModuleHandle(chrome::kBrowserProcessExecutableName);
+    if (!exe_module)
+      return;
+    set_crash_key = reinterpret_cast<SetCrashKeyValue>(
+        GetProcAddress(exe_module, "SetCrashKeyValueImpl"));
+  }
+
+  if (set_crash_key) {
+    (set_crash_key)(base::UTF8ToWide(key).data(),
+                    base::UTF8ToWide(value).data());
+  }
+}
+
+void ClearCrashKeyValueTrampoline(const base::StringPiece& key) {
+  static ClearCrashKeyValue clear_crash_key = NULL;
+  if (!clear_crash_key) {
+    HMODULE exe_module = GetModuleHandle(chrome::kBrowserProcessExecutableName);
+    if (!exe_module)
+      return;
+    clear_crash_key = reinterpret_cast<ClearCrashKeyValue>(
+        GetProcAddress(exe_module, "ClearCrashKeyValueImpl"));
+  }
+
+  if (clear_crash_key)
+    (clear_crash_key)(base::UTF8ToWide(key).data());
+}
+
+}  // namespace
+
 void Init() {
+  // Note: on other platforms, this is set up during Breakpad initialization,
+  // in ChromeBreakpadClient. But on Windows, that is before the DLL module is
+  // loaded, which is a prerequisite of the crash key system.
+  crash_keys::RegisterChromeCrashKeys();
+  base::debug::SetCrashKeyReportingFunctions(
+      &SetCrashKeyValueTrampoline, &ClearCrashKeyValueTrampoline);
+
   // This would be handled by BreakpadClient::SetCrashClientIdFromGUID(), but
   // because of the aforementioned issue, crash keys aren't ready yet at the
   // time of Breakpad initialization, load the client id backed up in Google