Add a web API clearCrashpadDatabase

This API will be used in crashpad handler test to clear up the previous
states to work around the upload throttling that causes the tests to
fail frequently for partner certification.

b/332895679

Change-Id: I0b104a64dbd156de6df817800c972042e810e654

cobalt/h5vcc/h5vcc_storage.cc

@@ -38,6 +38,8 @@ namespace h5vcc {
 
 namespace {
 
+const char kCrashpadDBName[] = "crashpad_database";
+
 const char kTestFileName[] = "cache_test_file.json";
 
 const uint32 kBufferSize = 16384;  // 16 KB
@@ -429,6 +431,15 @@ void H5vccStorage::ClearServiceWorkerCache() {
   base::DeleteFile(service_worker_file_path);
 }
 
+void H5vccStorage::ClearCrashpadDatabase() {
+  std::vector<char> cache_dir(kSbFileMaxPath + 1, 0);
+  SbSystemGetPath(kSbSystemPathCacheDirectory, cache_dir.data(),
+                  kSbFileMaxPath);
+  base::FilePath crashpad_db_dir =
+      base::FilePath(cache_dir.data()).Append(kCrashpadDBName);
+  ClearDirectory(crashpad_db_dir);
+}
+
 bool H5vccStorage::ValidatedCacheBackend() {
   if (!http_cache_) {
     return false;

cobalt/h5vcc/h5vcc_storage.h

@@ -71,6 +71,8 @@ class H5vccStorage : public script::Wrappable {
 
   void ClearServiceWorkerCache();
 
+  void ClearCrashpadDatabase();
+
   DEFINE_WRAPPABLE_TYPE(H5vccStorage);
 
  private:

cobalt/h5vcc/h5vcc_storage.idl

@@ -31,4 +31,7 @@ interface H5vccStorage {
   void clearCache();
   void clearCacheOfType(octet type_index);
   void clearServiceWorkerCache();
+
+  // Only intended to be used by tests
+  void clearCrashpadDatabase();
 };