Add GN arg to disable Alloy bootstrap (see #3681, see #3685)

Set enable_alloy_bootstrap=false to build with Alloy bootstrap code
removed. Extension API is documented as deprecated in comments but
not compiled out with this arg.

include/capi/cef_browser_capi.h

@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=7733ed87ade32dfd311c24c51263d20b9b469868$
+// $hash=6ee74f31d37a1b5ab3c9c5ccbe2dce9841329b38$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_BROWSER_CAPI_H_
@@ -911,6 +911,8 @@ typedef struct _cef_browser_host_t {
   /// Returns the extension hosted in this browser or NULL if no extension is
   /// hosted. See cef_request_context_t::LoadExtension for details.
   ///
+  /// WARNING: This function is deprecated and will be removed in ~M127.
+  ///
   struct _cef_extension_t*(CEF_CALLBACK* get_extension)(
       struct _cef_browser_host_t* self);
 
@@ -919,6 +921,8 @@ typedef struct _cef_browser_host_t {
   /// script. Background hosts do not have a window and are not displayable. See
   /// cef_request_context_t::LoadExtension for details.
   ///
+  /// WARNING: This function is deprecated and will be removed in ~M127.
+  ///
   int(CEF_CALLBACK* is_background_host)(struct _cef_browser_host_t* self);
 
   ///

include/capi/cef_extension_capi.h

@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=0ca2b788f70f8c9f5b2706d691d8e063be00ed19$
+// $hash=634054ad25154c30fb4ec630fe7fb79b0cf1f9b3$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_EXTENSION_CAPI_H_
@@ -54,6 +54,8 @@ struct _cef_request_context_t;
 /// Object representing an extension. Methods may be called on any thread unless
 /// otherwise indicated.
 ///
+/// WARNING: This API is deprecated and will be removed in ~M127.
+///
 typedef struct _cef_extension_t {
   ///
   /// Base structure.

include/capi/cef_extension_handler_capi.h

@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=5cfff4465a586d2b2ea7b54a9549096faec415f6$
+// $hash=ebac34c9b85de780ce7524211c5dd61a80d4576c$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_EXTENSION_HANDLER_CAPI_H_
@@ -80,6 +80,8 @@ typedef struct _cef_get_extension_resource_callback_t {
 /// cef_request_context_t::LoadExtension for information about extension
 /// loading.
 ///
+/// WARNING: This API is deprecated and will be removed in ~M127.
+///
 typedef struct _cef_extension_handler_t {
   ///
   /// Base structure.

include/capi/cef_request_context_capi.h

@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=7df03921b2ee743fb059f13e545ccf89904eb060$
+// $hash=2c496139ca9a59303b1493ee93d2c3ae96a956c0$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_REQUEST_CONTEXT_CAPI_H_
@@ -253,6 +253,8 @@ typedef struct _cef_request_context_t {
   /// See https://developer.chrome.com/extensions for extension implementation
   /// and usage documentation.
   ///
+  /// WARNING: This function is deprecated and will be removed in ~M127.
+  ///
   void(CEF_CALLBACK* load_extension)(struct _cef_request_context_t* self,
                                      const cef_string_t* root_directory,
                                      struct _cef_dictionary_value_t* manifest,
@@ -264,6 +266,8 @@ typedef struct _cef_request_context_t {
   /// access to the extension (see HasExtension). This function must be called
   /// on the browser process UI thread.
   ///
+  /// WARNING: This function is deprecated and will be removed in ~M127.
+  ///
   int(CEF_CALLBACK* did_load_extension)(struct _cef_request_context_t* self,
                                         const cef_string_t* extension_id);
 
@@ -273,6 +277,8 @@ typedef struct _cef_request_context_t {
   /// extension (see DidLoadExtension). This function must be called on the
   /// browser process UI thread.
   ///
+  /// WARNING: This function is deprecated and will be removed in ~M127.
+  ///
   int(CEF_CALLBACK* has_extension)(struct _cef_request_context_t* self,
                                    const cef_string_t* extension_id);
 
@@ -282,6 +288,8 @@ typedef struct _cef_request_context_t {
   /// extension ID values. Returns true (1) on success. This function must be
   /// called on the browser process UI thread.
   ///
+  /// WARNING: This function is deprecated and will be removed in ~M127.
+  ///
   int(CEF_CALLBACK* get_extensions)(struct _cef_request_context_t* self,
                                     cef_string_list_t extension_ids);
 
@@ -290,6 +298,8 @@ typedef struct _cef_request_context_t {
   /// extension is accessible in this context (see HasExtension). This function
   /// must be called on the browser process UI thread.
   ///
+  /// WARNING: This function is deprecated and will be removed in ~M127.
+  ///
   struct _cef_extension_t*(CEF_CALLBACK* get_extension)(
       struct _cef_request_context_t* self,
       const cef_string_t* extension_id);