WebUI: compress about_os_credits

Bug: 965089
Change-Id: I1a29243c5dd4ab9a446baa7c4ddebb3408e7f5dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1875485Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709046}

chrome/browser/browser_resources.grd

@@ -406,7 +406,7 @@
         <include name="IDR_MOBILE_SETUP_PORTAL_PAGE_HTML" file="resources\chromeos\mobile_setup_portal.html" flattenhtml="true" type="BINDATA" compress="gzip" />
 
         <include name="IDR_ECHO_MANIFEST" file="resources\chromeos\echo\manifest.json" type="BINDATA" />
-        <include name="IDR_OS_CREDITS_HTML" file="resources\chromeos\about_os_credits.html" flattenhtml="true" type="BINDATA" />
+        <include name="IDR_OS_CREDITS_HTML" file="resources\chromeos\about_os_credits.html" flattenhtml="true" type="BINDATA" compress="gzip" />
         <if expr="optimize_webui">
           <then>
             <include name="IDR_INTERNET_CONFIG_DIALOG_VULCANIZED_HTML" file="${root_gen_dir}\chrome\browser\resources\chromeos\internet_config_dialog\vulcanized.html" use_base_dir="false" flattenhtml="true" allowexternalscript="true" type="BINDATA" compress="gzip" />

chrome/browser/ui/webui/about_ui.cc

@@ -411,9 +411,9 @@ class ChromeOSCreditsHandler
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     // If we fail to load Chrome OS credits from disk, load it from resources.
     if (contents_.empty() && path_ != kKeyboardUtilsPath) {
-      contents_ = ui::ResourceBundle::GetSharedInstance()
-                      .GetRawDataResource(IDR_OS_CREDITS_HTML)
-                      .as_string();
+      contents_ =
+          ui::ResourceBundle::GetSharedInstance().DecompressDataResource(
+              IDR_OS_CREDITS_HTML);
     }
     callback_.Run(base::RefCountedString::TakeString(&contents_));
   }
@@ -481,9 +481,9 @@ class LinuxCreditsHandler
     // resources.
     // TODO(rjwright): Add a linux-specific placeholder in resources.
     if (contents_.empty() && path_ != kKeyboardUtilsPath) {
-      contents_ = ui::ResourceBundle::GetSharedInstance()
-                      .GetRawDataResource(IDR_OS_CREDITS_HTML)
-                      .as_string();
+      contents_ =
+          ui::ResourceBundle::GetSharedInstance().DecompressDataResource(
+              IDR_OS_CREDITS_HTML);
     }
     callback_.Run(base::RefCountedString::TakeString(&contents_));
   }