src/content/browser/android/content_startup_flags.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/android/content_startup_flags.h"
   6
   7 #include "base/base_switches.h"
   8 #include "base/command_line.h"
   9 #include "base/logging.h"
  10 #include "base/strings/string_number_conversions.h"
  11 #include "cc/base/switches.h"
  12 #include "content/public/browser/render_process_host.h"
  13 #include "content/public/common/content_constants.h"
  14 #include "content/public/common/content_switches.h"
  15 #include "gpu/command_buffer/service/gpu_switches.h"
  16 #include "ui/base/ui_base_switches.h"
  17 #include "ui/native_theme/native_theme_switches.h"
  18
  19 namespace content {
  20
  21 void SetContentCommandLineFlags(bool single_process,
  22                                 const std::string& plugin_descriptor) {
  23   // May be called multiple times, to cover all possible program entry points.
  24   static bool already_initialized = false;
  25   if (already_initialized)
  26     return;
  27   already_initialized = true;
  28
  29   base::CommandLine* parsed_command_line =
  30       base::CommandLine::ForCurrentProcess();
  31
  32   int command_line_renderer_limit = -1;
  33   if (parsed_command_line->HasSwitch(switches::kRendererProcessLimit)) {
  34     std::string limit = parsed_command_line->GetSwitchValueASCII(
  35         switches::kRendererProcessLimit);
  36     int value;
  37     if (base::StringToInt(limit, &value)) {
  38       command_line_renderer_limit = std::max(0, value);
  39     }
  40   }
  41
  42   if (command_line_renderer_limit > 0) {
  43     int limit = std::min(command_line_renderer_limit,
  44                          static_cast<int>(kMaxRendererProcessCount));
  45     RenderProcessHost::SetMaxRendererProcessCount(limit);
  46   }
  47
  48   if (single_process || command_line_renderer_limit == 0) {
  49     // Need to ensure the command line flag is consistent as a lot of chrome
  50     // internal code checks this directly, but it wouldn't normally get set when
  51     // we are implementing an embedded WebView.
  52     parsed_command_line->AppendSwitch(switches::kSingleProcess);
  53   }
  54
  55   parsed_command_line->AppendSwitch(
  56       switches::kEnableCompositingForFixedPosition);
  57   parsed_command_line->AppendSwitch(switches::kEnableAcceleratedOverflowScroll);
  58   parsed_command_line->AppendSwitch(switches::kEnableBeginFrameScheduling);
  59
  60   parsed_command_line->AppendSwitch(switches::kEnablePinch);
  61   parsed_command_line->AppendSwitch(switches::kEnableOverlayFullscreenVideo);
  62   parsed_command_line->AppendSwitch(switches::kEnableOverlayScrollbar);
  63   parsed_command_line->AppendSwitch(switches::kEnableOverscrollNotifications);
  64
  65   // Run the GPU service as a thread in the browser instead of as a
  66   // standalone process.
  67   parsed_command_line->AppendSwitch(switches::kInProcessGPU);
  68   parsed_command_line->AppendSwitch(switches::kDisableGpuShaderDiskCache);
  69
  70   parsed_command_line->AppendSwitch(switches::kEnableViewport);
  71   parsed_command_line->AppendSwitch(switches::kEnableViewportMeta);
  72   parsed_command_line->AppendSwitch(
  73       switches::kMainFrameResizesAreOrientationChanges);
  74
  75   // Disable anti-aliasing.
  76   parsed_command_line->AppendSwitch(
  77       cc::switches::kDisableCompositedAntialiasing);
  78
  79   parsed_command_line->AppendSwitch(switches::kUIPrioritizeInGpuProcess);
  80
  81   parsed_command_line->AppendSwitch(switches::kEnableDelegatedRenderer);
  82
  83   if (!plugin_descriptor.empty()) {
  84     parsed_command_line->AppendSwitchNative(
  85       switches::kRegisterPepperPlugins, plugin_descriptor);
  86   }
  87
  88   // Disable profiler timing by default.
  89   if (!parsed_command_line->HasSwitch(switches::kProfilerTiming)) {
  90     parsed_command_line->AppendSwitchASCII(
  91         switches::kProfilerTiming, switches::kProfilerTimingDisabledValue);
  92   }
  93 }
  94
  95 }  // namespace content