Disable chrome target and tests on Windows.

The bots don't have the capacity to link these targets.

TBR=dpranke

Review URL: https://codereview.chromium.org/891893002

Cr-Commit-Position: refs/heads/master@{#314065}

build/config/BUILDCONFIG.gn

@@ -76,6 +76,11 @@ declare_args() {
   # cross-compiles (compiling the same target for multiple toolchains in the
   # same build) to work.
   target_arch = "arm"
+
+  # TODO(brettw) remove this flag (and therefore enable linking all targets) on
+  # Windows when we have sufficient bot capacity. In the meantime, you can
+  # enable linking for local compiles.
+  link_chrome_on_windows = false
 }
 
 # =============================================================================

chrome/BUILD.gn

@@ -12,7 +12,14 @@ if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
-if (!is_android) {
+if (is_win && !link_chrome_on_windows) {
+  # When linking is disabled on Windows, create a dummy Chrome target to
+  # make targets work that depend on Chrome.
+  group("chrome") {
+  }
+}
+
+if (!is_android && (!is_win || link_chrome_on_windows)) {
   # TODO(GYP) for Windows need to the the reorder-imports step which probably
   # means adding another target and renaming this to chrome_initial like in GYP.
   executable("chrome") {

chrome/test/BUILD.gn

@@ -212,7 +212,7 @@ source_set("test_support_unit") {
   ]
 }
 
-if (!is_android) {
+if (!is_android && (!is_win || link_chrome_on_windows)) {
   gypi_values = exec_script("//build/gypi_to_gn.py",
                             [ rebase_path("../chrome_tests.gypi") ],
                             "scope",