Replace enable-compositing-for-fixed-position with prefer-compositing-to-lcd-text.

content/public/common/content_switches.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/public/common/content_switches.h"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 87 matching lines @@
 const char kDisableAcceleratedVideoDecode[] =
     "disable-accelerated-video-decode";
 
 // Disable the ApplicationCache.
 const char kDisableApplicationCache[]       = "disable-application-cache";
 
 // Disable limits on the number of backing stores. Can prevent blinking for
 // users with many windows/tabs and lots of memory.
 const char kDisableBackingStoreLimit[]      = "disable-backing-store-limit";
 
-// See comment for kEnableCompositingForFixedPosition.
-const char kDisableCompositingForFixedPosition[] =
-     "disable-fixed-position-compositing";
+// Disable the creation of compositing layers when it would prevent LCD text.
+const char kDisablePreferCompositingToLCDText[] =
+    "disable-prefer-compositing-to-lcd-text";
 
 // See comment for kEnableCompositingForTransition.
 const char kDisableCompositingForTransition[] =
      "disable-transition-compositing";
 
 // Disables HTML5 DB support.
 const char kDisableDatabases[]              = "disable-databases";
 
 // Disables delegated renderer.
 const char kDisableDelegatedRenderer[]      = "disable-delegated-renderer";
@@ skipping 183 matching lines @@
 // one composited layer to avoid pathological layer counts.
 const char kEnableLayerSquashing[] =
     "enable-layer-squashing";
 
 // Enable experimental container node culling.
 const char kEnableContainerCulling[]        = "enable-container-culling";
 
 // Use a BeginFrame signal from browser to renderer to schedule rendering.
 const char kEnableBeginFrameScheduling[]    = "enable-begin-frame-scheduling";
 
-// Enable the creation of compositing layers for fixed position
-// elements. Three options are needed to support four possible scenarios:
-//  1. Default (disabled)
-//  2. Enabled always (to allow dogfooding)
-//  3. Disabled always (to give safety fallback for users)
-//  4. Enabled only if we detect a highDPI display
-//
-// Option #4 may soon be the default, because the feature is needed soon for
-// high DPI, but cannot be used (yet) for low DPI. Options #2 and #3 will
-// override Option #4.
-const char kEnableCompositingForFixedPosition[] =
-     "enable-fixed-position-compositing";
+// Enable the creation of compositing layers when it would prevent LCD text.
+const char kEnablePreferCompositingToLCDText[] =
+    "enable-prefer-compositing-to-lcd-text";
 
 // Enable/Disable the creation of compositing layers for RenderLayers with a
 // transition on a property that supports accelerated animation (that is,
 // opacity, -webkit-transform, and -webkit-filter), even when no animation is
 // running. These options allow for three possible scenarios:
 //  1. Default (enabled only if we dectect a highDPI display)
 //  2. Enabled always.
 //  3. Disabled always.
 const char kEnableCompositingForTransition[] =
      "enable-transition-compositing";
@@ skipping 30 matching lines @@
 
 // Allow heuristics to determine when a layer tile should be drawn with the
 // Skia GPU backend. Only valid with GPU accelerated compositing +
 // impl-side painting.
 const char kEnableGpuRasterization[]        = "enable-gpu-rasterization";
 
 // When using CPU rasterizing generate low resolution tiling. Low res
 // tiles may be displayed during fast scrolls especially on slower devices.
 const char kEnableLowResTiling[] = "enable-low-res-tiling";
 
-// See comment for kEnableCompositingForFixedPosition.
-const char kEnableHighDpiCompositingForFixedPosition[] =

[danakj, 2014/08/15 21:11:12]

This flag was just sitting around here doing nothing but getting forwarded to
the renderer.

-     "enable-high-dpi-fixed-position-compositing";
-
 // Paint content on the compositor thread instead of the main thread.
 const char kEnableImplSidePainting[]        = "enable-impl-side-painting";
 
 // Enables support for inband text tracks in media content.
 const char kEnableInbandTextTracks[]        = "enable-inband-text-tracks";
 
 // Force logging to be enabled.  Logging is disabled by default in release
 // builds.
 const char kEnableLogging[]                 = "enable-logging";
 
@@ skipping 550 matching lines @@
 // Enable the Win32K process mitigation policy for renderer processes which
 // prevents them from invoking user32 and gdi32 system calls which enter
 // the kernel. This is only supported on Windows 8 and beyond.
 const char kEnableWin32kRendererLockDown[]
     = "enable_win32k_renderer_lockdown";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches