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diff --git a/chromium/content/renderer/render_thread_impl_unittest.cc b/chromium/content/renderer/render_thread_impl_unittest.cc
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/renderer/render_thread_impl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#include <string>
+
+namespace content {
+
+class RenderThreadImplUnittest : public testing::Test {
+ public:
+ RenderThreadImplUnittest()
+ : kCustomizableHistogram_("Histogram1"),
+ kNormalHistogram_("Histogram2") {}
+ virtual ~RenderThreadImplUnittest() {}
+ protected:
+ virtual void SetUp() OVERRIDE {
+ histogram_customizer_.custom_histograms_.clear();
+ histogram_customizer_.custom_histograms_.insert(kCustomizableHistogram_);
+ }
+ RenderThreadImpl::HistogramCustomizer histogram_customizer_;
+ const char* kCustomizableHistogram_;
+ const char* kNormalHistogram_;
+};
+
+TEST_F(RenderThreadImplUnittest, CustomHistogramsWithNoNavigations) {
+ // First there is no page -> no custom histograms.
+ EXPECT_EQ(kCustomizableHistogram_,
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kCustomizableHistogram_));
+ EXPECT_EQ(kNormalHistogram_,
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kNormalHistogram_));
+}
+
+TEST_F(RenderThreadImplUnittest, CustomHistogramsForOneRenderView) {
+ histogram_customizer_.RenderViewNavigatedToHost("mail.google.com", 1);
+ EXPECT_EQ(std::string(kCustomizableHistogram_) + ".gmail",
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kCustomizableHistogram_));
+ EXPECT_EQ(kNormalHistogram_,
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kNormalHistogram_));
+ histogram_customizer_.RenderViewNavigatedToHost("docs.google.com", 1);
+ EXPECT_EQ(std::string(kCustomizableHistogram_) + ".docs",
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kCustomizableHistogram_));
+ histogram_customizer_.RenderViewNavigatedToHost("nottracked.com", 1);
+ EXPECT_EQ(kCustomizableHistogram_,
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kCustomizableHistogram_));
+}
+
+TEST_F(RenderThreadImplUnittest, CustomHistogramsForTwoRenderViews) {
+ // First there is only one view.
+ histogram_customizer_.RenderViewNavigatedToHost("mail.google.com", 1);
+ // Second view created and it navigates to the same host -> we can have a
+ // custom diagram.
+ histogram_customizer_.RenderViewNavigatedToHost("mail.google.com", 2);
+ EXPECT_EQ(std::string(kCustomizableHistogram_) + ".gmail",
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kCustomizableHistogram_));
+ EXPECT_EQ(kNormalHistogram_,
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kNormalHistogram_));
+ // Now the views diverge (one of them navigates to a different host) -> no
+ // custom diagram.
+ histogram_customizer_.RenderViewNavigatedToHost("docs.google.com", 2);
+ EXPECT_EQ(kCustomizableHistogram_,
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kCustomizableHistogram_));
+ // After this point, there will never be a custom diagram again, even if the
+ // view navigated back to the common host.
+ histogram_customizer_.RenderViewNavigatedToHost("mail.google.com", 2);
+ EXPECT_EQ(kCustomizableHistogram_,
+ histogram_customizer_.ConvertToCustomHistogramName(
+ kCustomizableHistogram_));
+}
+
+} // namespace content