chrome: Add obsolete computer notice for x86 CPUs without SSE3.

Bug: 1123353
Change-Id: I2e9f30e3b847d4c3592f40fae2053a8434b248df
Tested: Manually, by making IsObsoleteCpu() always return true.
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427631
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810489}

chrome/app/chromium_strings.grd

@@ -293,6 +293,9 @@ If you update this file, be sure also to update google_chrome_strings.grd. -->
       <message name="IDS_ABOUT_TERMS_OF_SERVICE" desc="The terms of service label in the About box." translateable="false">
         Not used in Chromium. Placeholder to keep resource maps in sync.
       </message>
+      <message name="IDS_CPU_X86_SSE2_OBSOLETE_SOON" desc="A message displayed on an at-launch infobar and About (Help) page warning the user that the computer they are using will soon be or is already unsupported.">
+        This computer will soon stop receiving Chromium updates because its hardware is no longer supported.
+      </message>
       <if expr="is_macosx">
         <message name="IDS_MAC_10_10_OBSOLETE_SOON" desc="A message displayed on an at-launch infobar and About (Help) page warning the user that the OS version they are using will soon be or is already unsupported.">
           To get future Chromium updates, you'll need OS X 10.11 or later. This computer is using OS X 10.10.

chrome/app/chromium_strings_grd/IDS_CPU_X86_SSE2_OBSOLETE_SOON.png.sha1

+a0d88718e2f147504d28f0c417348a4d70db0aef
\ No newline at end of file

chrome/app/google_chrome_strings.grd

@@ -299,6 +299,9 @@ chromium_strings.grd. -->
       <message name="IDS_ABOUT_TERMS_OF_SERVICE" desc="The terms of service label in the About box.">
         Terms of Service
       </message>
+      <message name="IDS_CPU_X86_SSE2_OBSOLETE_SOON" desc="A message displayed on an at-launch infobar and About (Help) page warning the user that the computer they are using will soon be or is already unsupported.">
+        This computer will soon stop receiving Google Chrome updates because its hardware is no longer supported.
+      </message>
       <if expr="is_macosx">
         <message name="IDS_MAC_10_10_OBSOLETE_SOON" desc="A message displayed on an at-launch infobar and About (Help) page warning the user that the OS version they are using will soon be or is already unsupported.">
           To get future Google Chrome updates, you'll need OS X 10.11 or later. This computer is using OS X 10.10.

chrome/app/google_chrome_strings_grd/IDS_CPU_X86_SSE2_OBSOLETE_SOON.png.sha1

+3223a40ccdf0dc64119f047104c5e47b889d2bc9
\ No newline at end of file

chrome/browser/obsolete_system/obsolete_system_linux.cc

@@ -4,22 +4,41 @@
 
 #include "chrome/browser/obsolete_system/obsolete_system.h"
 
+#include "base/cpu.h"
+#include "build/build_config.h"
+#include "chrome/common/chrome_version.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/grit/chromium_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace {
+
+bool IsObsoleteCpu() {
+#if defined(ARCH_CPU_X86_FAMILY)
+  return !base::CPU().has_sse3();
+#else
+  return false;
+#endif
+}
+
+}  // namespace
+
 // static
 bool ObsoleteSystem::IsObsoleteNowOrSoon() {
-  return false;
+  return IsObsoleteCpu();
 }
 
 // static
 base::string16 ObsoleteSystem::LocalizedObsoleteString() {
-  return base::string16();
+  return l10n_util::GetStringUTF16(IDS_CPU_X86_SSE2_OBSOLETE_SOON);
 }
 
 // static
 bool ObsoleteSystem::IsEndOfTheLine() {
-  return false;
+  return CHROME_VERSION_MAJOR >= 88;
 }
 
 // static
 const char* ObsoleteSystem::GetLinkURL() {
-  return "";
+  return chrome::kCpuX86Sse2ObsoleteURL;
 }

chrome/browser/obsolete_system/obsolete_system_mac.cc

@@ -4,14 +4,18 @@
 
 #include "chrome/browser/obsolete_system/obsolete_system.h"
 
+#include "base/cpu.h"
 #include "base/system/sys_info.h"
+#include "build/build_config.h"
 #include "chrome/common/chrome_features.h"
+#include "chrome/common/chrome_version.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/chromium_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
-// static
-bool ObsoleteSystem::IsObsoleteNowOrSoon() {
+namespace {
+
+bool IsObsoleteOsVersion() {
   // Use base::SysInfo::OperatingSystemVersionNumbers() here rather than the
   // preferred base::mac::IsOS*() function because the IsOS functions for
   // obsolete system versions are removed to help prevent obsolete code from
@@ -23,17 +27,37 @@ bool ObsoleteSystem::IsObsoleteNowOrSoon() {
          base::FeatureList::IsEnabled(features::kShow10_10ObsoleteInfobar);
 }
 
+bool IsObsoleteCpu() {
+#if defined(ARCH_CPU_X86_FAMILY)
+  return !base::CPU().has_sse3();
+#else
+  return false;
+#endif
+}
+
+}  // namespace
+
+// static
+bool ObsoleteSystem::IsObsoleteNowOrSoon() {
+  return IsObsoleteCpu() || IsObsoleteOsVersion();
+}
+
 // static
 base::string16 ObsoleteSystem::LocalizedObsoleteString() {
-  return l10n_util::GetStringUTF16(IDS_MAC_10_10_OBSOLETE_SOON);
+  // We check for an obsolete CPU first so that we don't nudge users through
+  // an OS upgrade, only to find out that they need a new computer anyway.
+  return IsObsoleteCpu()
+             ? l10n_util::GetStringUTF16(IDS_CPU_X86_SSE2_OBSOLETE_SOON)
+             : l10n_util::GetStringUTF16(IDS_MAC_10_10_OBSOLETE_SOON);
 }
 
 // static
 bool ObsoleteSystem::IsEndOfTheLine() {
-  return true;
+  return IsObsoleteCpu() ? CHROME_VERSION_MAJOR >= 88 : true;
 }
 
 // static
 const char* ObsoleteSystem::GetLinkURL() {
-  return chrome::kMac10_10_ObsoleteURL;
+  return IsObsoleteCpu() ? chrome::kCpuX86Sse2ObsoleteURL
+                         : chrome::kMac10_10_ObsoleteURL;
 }

chrome/browser/obsolete_system/obsolete_system_win.cc

@@ -4,27 +4,51 @@
 
 #include "chrome/browser/obsolete_system/obsolete_system.h"
 
+#include "base/cpu.h"
 #include "base/win/windows_version.h"
+#include "build/build_config.h"
+#include "chrome/common/chrome_version.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/chromium_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
+namespace {
+
+bool IsObsoleteOsVersion() {
+  return base::win::GetVersion() < base::win::Version::WIN7;
+}
+
+bool IsObsoleteCpu() {
+#if defined(ARCH_CPU_X86_FAMILY)
+  return !base::CPU().has_sse3();
+#else
+  return false;
+#endif
+}
+
+}  // namespace
+
 // static
 bool ObsoleteSystem::IsObsoleteNowOrSoon() {
-  return base::win::GetVersion() < base::win::Version::WIN7;
+  return IsObsoleteCpu() || IsObsoleteOsVersion();
 }
 
 // static
 base::string16 ObsoleteSystem::LocalizedObsoleteString() {
-  return l10n_util::GetStringUTF16(IDS_WIN_XP_VISTA_OBSOLETE);
+  // We check for an obsolete CPU first so that we don't nudge users through
+  // an OS upgrade, only to find out that they need a new computer anyway.
+  return IsObsoleteCpu()
+             ? l10n_util::GetStringUTF16(IDS_CPU_X86_SSE2_OBSOLETE_SOON)
+             : l10n_util::GetStringUTF16(IDS_WIN_XP_VISTA_OBSOLETE);
 }
 
 // static
 bool ObsoleteSystem::IsEndOfTheLine() {
-  return true;
+  return IsObsoleteCpu() ? CHROME_VERSION_MAJOR >= 88 : true;
 }
 
 // static
 const char* ObsoleteSystem::GetLinkURL() {
-  return chrome::kWindowsXPVistaDeprecationURL;
+  return IsObsoleteCpu() ? chrome::kCpuX86Sse2ObsoleteURL
+                         : chrome::kWindowsXPVistaDeprecationURL;
 }

chrome/common/url_constants.cc

@@ -117,6 +117,9 @@ const char kContentSettingsExceptionsLearnMoreURL[] =
 const char kCookiesSettingsHelpCenterURL[] =
     "https://support.google.com/chrome?p=cpn_cookies";
 
+const char kCpuX86Sse2ObsoleteURL[] =
+    "https://support.google.com/chrome/?p=unsupported_cpu";
+
 const char kCrashReasonURL[] =
 #if defined(OS_CHROMEOS)
     "https://support.google.com/chromebook/?p=e_awsnap";

chrome/common/url_constants.h

@@ -127,6 +127,9 @@ extern const char kContentSettingsExceptionsLearnMoreURL[];
 // "Learn more" URL for cookies.
 extern const char kCookiesSettingsHelpCenterURL[];
 
+// The URL for the "learn more" link on the SSE2 obsolescence infobar.
+extern const char kCpuX86Sse2ObsoleteURL[];
+
 // "Learn more" URL for "Aw snap" page when showing "Reload" button.
 extern const char kCrashReasonURL[];