Reland "Add Boca API key."

This reverts commit b2aa0c30ff.

Reason for revert: google_internal needed a manual roll up: https://chromium-review.googlesource.com/c/chromium/src/+/5917342

Original change's description:
> Revert "Add Boca API key."
>
> This reverts commit 43bf3dc6db.
>
> Reason for revert: Causes massive breakage in ChromeOS tests all over the tree. Bisected as culprit.
>
> Original change's description:
> > Add Boca API key.
> >
> > The Boca API key will be used for Live Translate on ChromeOS.
> >
> > Bug: b/359931233
> > Change-Id: Ie9b18ec6d0eb781c245301125b177ed4161386c4
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5908987
> > Reviewed-by: Avynn Donaghe <avynn@google.com>
> > Commit-Queue: Dorian Brandon <dorianbrandon@google.com>
> > Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#1364855}
>
> Bug: b/359931233
> Change-Id: Ifc49a7176f484f511edf11601b9afedca2f34e23
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5912855
> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Auto-Submit: Steinar H Gunderson <sesse@chromium.org>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Owners-Override: Steinar H Gunderson <sesse@chromium.org>
> Commit-Queue: Steinar H Gunderson <sesse@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1364904}

Bug: b/359931233
Change-Id: Ib665729e9de678cd921bf8642043d00efb458ef9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5917407
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Commit-Queue: Dorian Brandon <dorianbrandon@google.com>
Cr-Commit-Position: refs/heads/main@{#1366428}

google_apis/api_key_cache.cc

@@ -203,6 +203,13 @@ ApiKeyCache::ApiKeyCache(const DefaultApiKeys& default_api_keys) {
       std::string(), environment.get(), command_line, gaia_config,
       default_api_keys.allow_override_via_environment,
       default_api_keys.allow_unset_values);
+
+  api_key_boca_ = CalculateKeyValue(
+      default_api_keys.google_api_key_boca,
+      STRINGIZE_NO_EXPANSION(GOOGLE_API_KEY_BOCA), std::string(), nullptr,
+      std::string(), environment.get(), command_line, gaia_config,
+      default_api_keys.allow_override_via_environment,
+      default_api_keys.allow_unset_values);
 #endif
 
   metrics_key_ = CalculateKeyValue(

google_apis/api_key_cache.h

@@ -43,6 +43,7 @@ class COMPONENT_EXPORT(GOOGLE_APIS) ApiKeyCache {
   const std::string& api_key_sharing() const { return api_key_sharing_; }
   const std::string& api_key_read_aloud() const { return api_key_read_aloud_; }
   const std::string& api_key_fresnel() const { return api_key_fresnel_; }
+  const std::string& api_key_boca() const { return api_key_boca_; }
 #endif
 
   const std::string& metrics_key() const { return metrics_key_; }
@@ -72,6 +73,7 @@ class COMPONENT_EXPORT(GOOGLE_APIS) ApiKeyCache {
   std::string api_key_sharing_;
   std::string api_key_read_aloud_;
   std::string api_key_fresnel_;
+  std::string api_key_boca_;
 #endif
 
   std::string metrics_key_;

google_apis/default_api_keys-inc.cc

@@ -88,6 +88,10 @@
 #if !defined(GOOGLE_API_KEY_FRESNEL)
 #define GOOGLE_API_KEY_FRESNEL google_apis::DefaultApiKeys::kUnsetApiToken
 #endif
+
+#if !defined(GOOGLE_API_KEY_BOCA)
+#define GOOGLE_API_KEY_BOCA google_apis::DefaultApiKeys::kUnsetApiToken
+#endif
 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)
 
 // These are used as shortcuts for developers and users providing
@@ -122,6 +126,7 @@ constexpr ::google_apis::DefaultApiKeys GetDefaultApiKeysFromDefinedValues() {
       .google_api_key_sharing = GOOGLE_API_KEY_SHARING,
       .google_api_key_read_aloud = GOOGLE_API_KEY_READ_ALOUD,
       .google_api_key_fresnel = GOOGLE_API_KEY_FRESNEL,
+      .google_api_key_boca = GOOGLE_API_KEY_BOCA,
 #endif
       .google_client_id_main = GOOGLE_CLIENT_ID_MAIN,
       .google_client_secret_main = GOOGLE_CLIENT_SECRET_MAIN,

google_apis/default_api_keys.h

@@ -35,6 +35,7 @@ struct DefaultApiKeys {
   const char* google_api_key_sharing;
   const char* google_api_key_read_aloud;
   const char* google_api_key_fresnel;
+  const char* google_api_key_boca;
 #endif
 
   const char* google_client_id_main;

google_apis/google_api_keys.cc

@@ -99,6 +99,10 @@ const std::string& GetReadAloudAPIKey() {
 const std::string& GetFresnelAPIKey() {
   return GetApiKeyCacheInstance().api_key_fresnel();
 }
+
+const std::string& GetBocaAPIKey() {
+  return GetApiKeyCacheInstance().api_key_boca();
+}
 #endif
 
 #if BUILDFLAG(SUPPORT_EXTERNAL_GOOGLE_API_KEY)

google_apis/google_api_keys.h

@@ -111,6 +111,9 @@ COMPONENT_EXPORT(GOOGLE_APIS) const std::string& GetReadAloudAPIKey();
 
 // Retrieves the Fresnel API Key.
 COMPONENT_EXPORT(GOOGLE_APIS) const std::string& GetFresnelAPIKey();
+
+// Retrieves the Boca API Key.
+COMPONENT_EXPORT(GOOGLE_APIS) const std::string& GetBocaAPIKey();
 #endif
 
 #if BUILDFLAG(SUPPORT_EXTERNAL_GOOGLE_API_KEY)