Update legacy Tuple-using code.

content/browser/renderer_host/render_widget_host_unittest.cc

Index: content/browser/renderer_host/render_widget_host_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_unittest.cc b/content/browser/renderer_host/render_widget_host_unittest.cc
index 2e3ba90de621495ad622177145b1f9ceac40426c..799a835bc7be2ce17533c4600362d1673b13d0ce 100644
--- a/content/browser/renderer_host/render_widget_host_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_unittest.cc
@@ -780,9 +780,9 @@ TEST_F(RenderWidgetHostTest, Background) {
       process_->sink().GetUniqueMessageMatching(
           ViewMsg_SetBackgroundOpaque::ID);
   ASSERT_TRUE(set_background);
-  Tuple1<bool> sent_background;
+  Tuple<bool> sent_background;
   ViewMsg_SetBackgroundOpaque::Read(set_background, &sent_background);
-  EXPECT_FALSE(sent_background.a);
+  EXPECT_FALSE(get<0>(sent_background));
 
 #if defined(USE_AURA)
   // See the comment above |InitAsChild(NULL)|.
@@ -817,9 +817,9 @@ TEST_F(RenderWidgetHostTest, HiddenPaint) {
   const IPC::Message* restored = process_->sink().GetUniqueMessageMatching(
       ViewMsg_WasShown::ID);
   ASSERT_TRUE(restored);
-  Tuple2<bool, ui::LatencyInfo> needs_repaint;
+  Tuple<bool, ui::LatencyInfo> needs_repaint;
   ViewMsg_WasShown::Read(restored, &needs_repaint);
-  EXPECT_TRUE(needs_repaint.a);
+  EXPECT_TRUE(get<0>(needs_repaint));
 }
 
 TEST_F(RenderWidgetHostTest, IgnoreKeyEventsHandledByRenderer) {
@@ -1021,7 +1021,7 @@ std::string GetInputMessageTypes(RenderWidgetHostProcess* process) {
     EXPECT_EQ(InputMsg_HandleInputEvent::ID, message->type());
     InputMsg_HandleInputEvent::Param params;
     EXPECT_TRUE(InputMsg_HandleInputEvent::Read(message, &params));
-    const WebInputEvent* event = params.a;
+    const WebInputEvent* event = get<0>(params);
     if (i != 0)
       result += " ";
     result += WebInputEventTraits::GetName(event->type);
@@ -1343,7 +1343,7 @@ ui::LatencyInfo GetLatencyInfoFromInputEvent(RenderWidgetHostProcess* process) {
   InputMsg_HandleInputEvent::Param params;
   EXPECT_TRUE(InputMsg_HandleInputEvent::Read(message, &params));
   process->sink().ClearMessages();
-  return params.b;
+  return get<1>(params);
 }
 
 void CheckLatencyInfoComponentInMessage(RenderWidgetHostProcess* process,