Pull in sysroots on Linux

R=thestig@chromium.org

Change-Id: I8af51bec8ddfdee8c61806b844f0ca9a2b8c8c20
Reviewed-on: https://pdfium-review.googlesource.com/8190
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

2 files changed, 14 insertions, 6 deletions

diff --git a/DEPS b/DEPS
index 1cd7dcc036..0ad0f78588 100644
--- a/DEPS
+++ b/DEPS
@@ -92,6 +92,11 @@ deps = {
     Var('chromium_git') + "/chromium/src/tools/generate_library_loader@" +
         Var('gen_library_loader_revision'),
 
+  # TODO(GYP): Remove this when no tools rely on GYP anymore.
+  "tools/gyp":
+    Var('chromium_git') + '/external/gyp.git@' +
+        'eb296f67da078ec01f5e3a9ea9cdc6d26d680161',
+
   "tools/memory":
     Var('chromium_git') + "/chromium/src/tools/memory@" +
         Var('tools_memory_revision'),
@@ -114,11 +119,6 @@ deps_os = {
       Var('chromium_git') + '/chromium/deps/yasm/binaries.git' + '@' +
           Var('yasm_binary_revision'),
 
-    # TODO(GYP): Remove this when no tools rely on GYP anymore.
-    "tools/gyp":
-      Var('chromium_git') + '/external/gyp.git@' +
-          'c61b0b35c8396bfd59efc6cfc11401d912b0f510',
-
     "v8/third_party/cygwin":
       Var('chromium_git') + "/chromium/deps/cygwin@" + Var('cygwin_revision'),
   },
@@ -219,6 +219,15 @@ hooks = [
     ],
   },
   {
+    # Downloads the current stable linux sysroot to build/linux/ if needed.
+    # This sysroot updates at about the same rate that the chrome build deps
+    # change.
+    'name': 'sysroot',
+    'pattern': '.',
+    'action': ['python', 'pdfium/build/linux/sysroot_scripts/install-sysroot.py',
+               '--running-as-hook'],
+  },
+  {
     # Update the Windows toolchain if necessary.
     'name': 'win_toolchain',
     'pattern': '.',
diff --git a/README.md b/README.md
index 22aeacd340..ca443950a9 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,6 @@ pdf_is_standalone = true  # Set for a non-embedded build.
 is_component_build = false # Disable component build (must be false)
 
 clang_use_chrome_plugins = false  # Currently must be false.
-use_sysroot = false  # Currently must be false on Linux, but entirely omitted on windows.
 ```
 
 Note, you must set `pdf_is_standalone = true` if you want the sample