Plumb API key for Fresnel service authorization.

API key will be used for authenticating device with Fresnel Oneplatform
API. This provides one layer of protection against unauthenticated
requests.

Googlers: go/cros-device-actives-client - See Authorization section

Bug: 1204630
Change-Id: I9dc9ea0391edd1057bc666c2c66c95a196ad0dd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3069422
Commit-Queue: Hirthanan Subenderan <hirthanan@google.com>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/main@{#947610}

google_apis/google_api_keys.cc

@@ -97,6 +97,11 @@
 #define GOOGLE_API_KEY_READ_ALOUD DUMMY_API_TOKEN
 #endif
 
+// API key for the Fresnel API.
+#if !defined(GOOGLE_API_KEY_FRESNEL)
+#define GOOGLE_API_KEY_FRESNEL DUMMY_API_TOKEN
+#endif
+
 // These are used as shortcuts for developers and users providing
 // OAuth credentials via preprocessor defines or environment
 // variables.  If set, they will be used to replace any of the client
@@ -154,6 +159,10 @@ class APIKeyCache {
         STRINGIZE_NO_EXPANSION(GOOGLE_API_KEY_READ_ALOUD), nullptr,
         std::string(), environment.get(), command_line, gaia_config);
 
+    api_key_fresnel_ = CalculateKeyValue(
+        GOOGLE_API_KEY_FRESNEL, STRINGIZE_NO_EXPANSION(GOOGLE_API_KEY_FRESNEL),
+        nullptr, std::string(), environment.get(), command_line, gaia_config);
+
     metrics_key_ = CalculateKeyValue(
         GOOGLE_METRICS_SIGNING_KEY,
         STRINGIZE_NO_EXPANSION(GOOGLE_METRICS_SIGNING_KEY), nullptr,
@@ -221,6 +230,7 @@ class APIKeyCache {
   std::string api_key_sharing() const { return api_key_sharing_; }
   std::string api_key_soda() const { return api_key_soda_; }
   std::string api_key_read_aloud() const { return api_key_read_aloud_; }
+  std::string api_key_fresnel() const { return api_key_fresnel_; }
 
   std::string metrics_key() const { return metrics_key_; }
 
@@ -335,6 +345,7 @@ class APIKeyCache {
   std::string api_key_sharing_;
   std::string api_key_soda_;
   std::string api_key_read_aloud_;
+  std::string api_key_fresnel_;
   std::string metrics_key_;
   std::string client_ids_[CLIENT_NUM_ITEMS];
   std::string client_secrets_[CLIENT_NUM_ITEMS];
@@ -371,6 +382,10 @@ std::string GetReadAloudAPIKey() {
   return g_api_key_cache.Get().api_key_read_aloud();
 }
 
+std::string GetFresnelAPIKey() {
+  return g_api_key_cache.Get().api_key_fresnel();
+}
+
 #if defined(OS_IOS) || defined(OS_FUCHSIA)
 void SetAPIKey(const std::string& api_key) {
   g_api_key_cache.Get().set_api_key(api_key);

google_apis/google_api_keys.h

@@ -88,6 +88,9 @@ std::string GetSodaAPIKey();
 // Retrieves the ReadAloud API Key.
 std::string GetReadAloudAPIKey();
 
+// Retrieves the Fresnel API Key.
+std::string GetFresnelAPIKey();
+
 #if defined(OS_IOS) || defined(OS_FUCHSIA)
 // Sets the API key. This should be called as early as possible before this
 // API key is even accessed. It must be called before GetAPIKey.