Fix RenderWidgetHostViewAuraTest failure on devices with little memory

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

 // 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/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/shared_memory.h"
@@ skipping 2030 matching lines @@
     views[i]->Destroy();
     delete hosts[i];
   }
 }
 
 // Test that changing the memory pressure should delete saved frames. This test
 // only applies to ChromeOS.
 TEST_F(RenderWidgetHostViewAuraTest, DiscardDelegatedFramesWithMemoryPressure) {
   view_->InitAsChild(NULL);
 
-  size_t max_renderer_frames =
-      RendererFrameManager::GetInstance()->GetMaxNumberOfSavedFrames();
-  ASSERT_LE(2u, max_renderer_frames);
-  size_t renderer_count = max_renderer_frames;
+  // The test logic below relies on having max_renderer_frames > 2.  By default,
+  // this value is calculated from total physical memory and causes the test to
+  // fail when run on hardware with < 256MB of RAM.
+  const size_t kMaxRendererFrames = 5;
+  RendererFrameManager::GetInstance()->set_max_number_of_saved_frames(
+      kMaxRendererFrames);
+
+  size_t renderer_count = kMaxRendererFrames;
   gfx::Rect view_rect(100, 100);
   gfx::Size frame_size = view_rect.size();
   DCHECK_EQ(0u, HostSharedBitmapManager::current()->AllocatedBitmapCount());
 
   scoped_ptr<RenderWidgetHostImpl * []> hosts(
       new RenderWidgetHostImpl* [renderer_count]);
   scoped_ptr<FakeRenderWidgetHostViewAura * []> views(
       new FakeRenderWidgetHostViewAura* [renderer_count]);
 
   // Create a bunch of renderers.
@@ skipping 1400 matching lines @@
   ViewMsg_SetSurfaceIdNamespace::Read(msg, &params);
   view_->InitAsChild(NULL);
   view_->Show();
   view_->SetSize(size);
   view_->OnSwapCompositorFrame(0,
                                MakeDelegatedFrame(1.f, size, gfx::Rect(size)));
   EXPECT_EQ(view_->GetSurfaceIdNamespace(), get<0>(params));
 }
 
 }  // namespace content