Stop passing --platform to download_from_google_storage.

All the calls are protected by gclient conditionals now, so the flags
are no longer needed.

Mostly no functional change, except one: The Windows orderfiles hook now
runs on non-Windows hosts when targeting Windows.

Bug: 495204
Change-Id: I549409dc945b7ecf0fe060908923834dbf0cf0a3
Reviewed-on: https://chromium-review.googlesource.com/723922Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509671}

DEPS

@@ -782,7 +782,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'src/buildtools/win/gn.exe.sha1',
@@ -795,7 +794,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=darwin',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'src/buildtools/mac/gn.sha1',
@@ -808,7 +806,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'src/buildtools/linux64/gn.sha1',
@@ -822,7 +819,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
                 '-s', 'src/buildtools/win/clang-format.exe.sha1',
@@ -835,7 +831,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=darwin',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
                 '-s', 'src/buildtools/mac/clang-format.sha1',
@@ -848,7 +843,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
                 '-s', 'src/buildtools/linux64/clang-format.sha1',
@@ -862,7 +856,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-browser-clang/orderfiles',
                 '-d', 'src/chrome/build',
@@ -876,7 +869,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-luci',
                 '-d', 'src/tools/luci-go/win64',
@@ -889,7 +881,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=darwin',
                 '--no_auth',
                 '--bucket', 'chromium-luci',
                 '-d', 'src/tools/luci-go/mac64',
@@ -902,7 +893,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-luci',
                 '-d', 'src/tools/luci-go/linux64',
@@ -928,7 +918,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=win32',
                 '--directory',
                 '--recursive',
                 '--no_auth',
@@ -990,7 +979,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=linux*',
                 '--extract',
                 '--no_auth',
                 '--bucket', 'chromium-nodejs/6.9.4',
@@ -1004,7 +992,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=darwin',
                 '--extract',
                 '--no_auth',
                 '--bucket', 'chromium-nodejs/6.9.4',
@@ -1018,7 +1005,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-nodejs/6.9.4',
                 '-s', 'src/third_party/node/win/node.exe.sha1',
@@ -1059,7 +1045,6 @@ hooks = [
     'action': [ 'python',
                 'src/third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
-                '--platform=linux*',
                 '--no_auth',
                 '--num_threads=4',
                 '--bucket', 'chromium-tools-traffic_annotation',
@@ -1335,7 +1320,6 @@ hooks = [
     'action': [   'python',
                   'src/third_party/depot_tools/download_from_google_storage.py',
                   '--no_resume',
-                  '--platform=linux*',
                   '--no_auth',
                   '--bucket', 'chromium-gvr-static-shim',
                   '-s', 'src/third_party/gvr-android-sdk/libgvr_shim_static_arm.a.sha1',
@@ -1348,7 +1332,6 @@ hooks = [
     'action': [   'python',
                   'src/third_party/depot_tools/download_from_google_storage.py',
                   '--no_resume',
-                  '--platform=linux*',
                   '--no_auth',
                   '--bucket', 'chromium-gvr-static-shim',
                   '-s', 'src/third_party/gvr-android-sdk/libgvr_shim_static_arm64.a.sha1',
@@ -1361,7 +1344,6 @@ hooks = [
     'action': [   'python',
                   'src/third_party/depot_tools/download_from_google_storage.py',
                   '--no_resume',
-                  '--platform=linux*',
                   '--no_auth',
                   '--bucket', 'chromium-gvr-static-shim/controller_test_api',
                   '-s', 'src/third_party/gvr-android-sdk/test-libraries/controller_test_api.aar.sha1',