diff --git a/tools/idegen/README b/tools/idegen/README
index d9444408e..821559b19 100644
--- a/tools/idegen/README
+++ b/tools/idegen/README
@@ -61,9 +61,9 @@ Excluding source roots and jars
     use Java's regular expression parser (see java.util.regex.Parser).
 
     You can create your own additional exclusion list by creating an
-    "excluded-paths" file in the project's root directory. For example, you
-    might exclude all apps except the Browser in your IDE configuration with
-    this regular expression: "^packages/apps/(?!Browser)".
+    "excluded-paths" file in the project's root directory or your vendor
+    directory. For example, you might exclude all apps except the Browser in your
+    IDE configuration with this regular expression: "^packages/apps/(?!Browser)".
 
 Controlling source root ordering (Eclipse)
 
diff --git a/tools/idegen/excluded-paths b/tools/idegen/excluded-paths
index 9122c3020..a5dd3040e 100644
--- a/tools/idegen/excluded-paths
+++ b/tools/idegen/excluded-paths
@@ -6,7 +6,8 @@
 # document the reason for each exclusion.
 #
 # Developers can also create an 'excluded-paths' file in the project's root
-# directory and add their own excludes to slim down their build.
+# directory or their vendor directory and add their own excludes to slim
+# down their build.
 #
 # Currently, we lump all the .java files together into one big module, so you
 # can't have two classes with the same name at once. In the future, we'll
diff --git a/tools/idegen/src/Configuration.java b/tools/idegen/src/Configuration.java
index e92b58eb2..679269f75 100644
--- a/tools/idegen/src/Configuration.java
+++ b/tools/idegen/src/Configuration.java
@@ -48,6 +48,9 @@ public class Configuration {
     /** File name used for excluded path files. */
     private static final String EXCLUDED_PATHS = "excluded-paths";
 
+    /** The vendor directory. */
+    private static final String VENDOR_PATH = "./vendor/";
+
     /**
      * Constructs a Configuration by traversing the directory tree, looking
      * for .java and .jar files and identifying source roots.
@@ -91,12 +94,8 @@ public class Configuration {
         File globalExcludes = new File(toolDirectory, EXCLUDED_PATHS);
         parseFile(globalExcludes, patterns);
 
-        // Look for Google-specific excludes.
-        // TODO: Traverse all vendor-specific directories.
-        File googleExcludes = new File("./vendor/google/" + EXCLUDED_PATHS);
-        if (googleExcludes.exists()) {
-            parseFile(googleExcludes, patterns);
-        }
+        // Traverse all vendor-specific directories
+        readVendorExcludes(patterns);
 
         // Look for user-specific excluded-paths file in current directory.
         File localExcludes = new File(EXCLUDED_PATHS);
@@ -107,6 +106,23 @@ public class Configuration {
         return new Excludes(patterns);
     }
 
+    /**
+     * Reads vendor excluded path files.
+     * @see #readExcludes()
+     */
+    private static void readVendorExcludes(List<Pattern> out) throws IOException {
+        File vendorDir = new File(VENDOR_PATH);
+        File[] vendorList;
+        if (!vendorDir.exists() || (vendorList = vendorDir.listFiles()) == null) return;
+        for (File vendor : vendorList) {
+            File vendorExcludes = new File(vendor, EXCLUDED_PATHS);
+            if (vendorExcludes.exists()) {
+                Log.info("Read vendor excludes: " + vendorExcludes.getPath());
+                parseFile(vendorExcludes, out);
+            }
+        }
+    }
+
     /**
      * Recursively finds .java source roots, .jar files, and excluded
      * directories.