Fix android GN build for chromedriver test

chrome/test/chromedriver/chrome/chrome_finder.cc

Index: chrome/test/chromedriver/chrome/chrome_finder.cc
diff --git a/chrome/test/chromedriver/chrome/chrome_finder.cc b/chrome/test/chromedriver/chrome/chrome_finder.cc
index dcc5172ff55513939445df9c27b98c8fd0c824c6..4cd5da66ceca1d1a94c05451b4cc5a4e33d35e49 100644
--- a/chrome/test/chromedriver/chrome/chrome_finder.cc
+++ b/chrome/test/chromedriver/chrome/chrome_finder.cc
@@ -52,6 +52,10 @@ void GetApplicationDirs(std::vector<base::FilePath>* locations) {
   locations->push_back(base::FilePath("/bin"));
   locations->push_back(base::FilePath("/sbin"));
 }
+#elif defined(OS_ANDROID)
+void GetApplicationDirs(std::vector<base::FilePath>* locations) {
+  // On Android we won't be able to find Chrome executable
+}
 #endif
 
 }  // namespace
@@ -82,23 +86,23 @@ void GetApplicationDirs(std::vector<base::FilePath>* locations);
 #endif
 
 bool FindChrome(base::FilePath* browser_exe) {
-#if defined(OS_WIN)
   base::FilePath browser_exes_array[] = {
+#if defined(OS_WIN)
       base::FilePath(L"chrome.exe")
-  };
 #elif defined(OS_MACOSX)
-  base::FilePath browser_exes_array[] = {
       base::FilePath("Google Chrome.app/Contents/MacOS/Google Chrome"),
       base::FilePath("Chromium.app/Contents/MacOS/Chromium")
-  };
 #elif defined(OS_LINUX)
-  base::FilePath browser_exes_array[] = {
       base::FilePath("google-chrome"),
       base::FilePath("chrome"),
       base::FilePath("chromium"),
       base::FilePath("chromium-browser")
-  };
+#else
+      // it will compile but won't work on other OSes
+      base::FilePath()
 #endif
+  };
+
   std::vector<base::FilePath> browser_exes(
       browser_exes_array, browser_exes_array + arraysize(browser_exes_array));
   base::FilePath module_dir;