Delete the GPU recipe and code that only it depended on.

scripts/slave/recipe_modules/chromium/test_api.py

Index: scripts/slave/recipe_modules/chromium/test_api.py
diff --git a/scripts/slave/recipe_modules/chromium/test_api.py b/scripts/slave/recipe_modules/chromium/test_api.py
index cba1f57f60e3bd3dbad3c0bed3b99bcaada95180..84ce0eff8a04cc5c9197714e02a5fd8f8ce219f0 100644
--- a/scripts/slave/recipe_modules/chromium/test_api.py
+++ b/scripts/slave/recipe_modules/chromium/test_api.py
@@ -39,3 +39,14 @@ class ChromiumTestApi(recipe_test_api.RecipeTestApi):
         if override_step_data:
             test += override_step_data
         yield test
+
+  # The following data was generated by running 'gyp_chromium
+  # --analyzer' with input JSON files corresponding to changes
+  # affecting these targets.
+  @property
+  def analyze_builds_nothing(self):
+    return self.m.json.output({
+        'status': 'No dependencies',
+        'compile_targets': [],
+        'test_targets': [],
+        })