Support maximize window command.

chrome/test/webdriver/webdriver_session.cc

Index: chrome/test/webdriver/webdriver_session.cc
diff --git a/chrome/test/webdriver/webdriver_session.cc b/chrome/test/webdriver/webdriver_session.cc
index 4e704c8c62baf17cf83c3a289084cb005979c6ab..13e4834e68ed6f0c74878c0b67b7868d42b5102d 100644
--- a/chrome/test/webdriver/webdriver_session.cc
+++ b/chrome/test/webdriver/webdriver_session.cc
@@ -665,7 +665,7 @@ Error* Session::SwitchToFrameWithIndex(int index) {
   // tagName of the frameElement. If child frame N is from another domain, then
   // the following will run afoul of the same origin policy:
   //   window.frames[N].frameElement;
-  // Instead of indexing window.frames, we use a an XPath expression to index
+  // Instead of indexing window.frames, we use an XPath expression to index
   // into the list of all IFRAME and FRAME elements on the page - if we find
   // something, then that XPath expression can be used as the new frame's XPath.
   std::string script =
@@ -790,6 +790,16 @@ Error* Session::SetWindowBounds(
   return error;
 }
 
+Error* Session::MaximizeWindow(const WebViewId& window) {
+  Error* error = NULL;
+  RunSessionTask(base::Bind(
+        &Automation::MaximizeView,
+        base::Unretained(automation_.get()),
+        window,
+        &error));
+  return error;
+}
+
 Error* Session::GetAlertMessage(std::string* text) {
   Error* error = NULL;
   RunSessionTask(base::Bind(