Fix some extern usage in .cc files.

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"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
 // have an effect. 0 disables MSAA.
@@ skipping 83 matching lines @@
 const char kDisableDelayAgnosticAec[]       = "disable-delay-agnostic-aec";
 
 // Disables delegated renderer.
 const char kDisableDelegatedRenderer[]      = "disable-delegated-renderer";
 
 // Handles URL requests by NPAPI plugins through the renderer.
 const char kDisableDirectNPAPIRequests[]    = "disable-direct-npapi-requests";
 
 // Disable the per-domain blocking for 3D APIs after GPU reset.
 // This switch is intended only for tests.
-extern const char kDisableDomainBlockingFor3DAPIs[] =
+const char kDisableDomainBlockingFor3DAPIs[] =
     "disable-domain-blocking-for-3d-apis";
 
 // Disable experimental WebGL support.
 const char kDisableExperimentalWebGL[]      = "disable-webgl";
 
 // Disable FileSystem API.
 const char kDisableFileSystem[]             = "disable-file-system";
 
 // Disable 3D inside of flapper.
 const char kDisableFlash3d[]                = "disable-flash-3d";
 
 // Disable Stage3D inside of flapper.
 const char kDisableFlashStage3d[]           = "disable-flash-stage3d";
 
 // Disables GPU hardware acceleration.  If software renderer is not in place,
 // then the GPU process won't launch.
 const char kDisableGpu[]                    = "disable-gpu";
 
 // Prevent the compositor from using its GPU implementation.
 const char kDisableGpuCompositing[]         = "disable-gpu-compositing";
 
 // Disable proactive early init of GPU process.
 const char kDisableGpuEarlyInit[]           = "disable-gpu-early-init";
 
 // Disable the limit on the number of times the GPU process may be restarted
 // This switch is intended only for tests.
-extern const char kDisableGpuProcessCrashLimit[] =
-    "disable-gpu-process-crash-limit";
+const char kDisableGpuProcessCrashLimit[] = "disable-gpu-process-crash-limit";
 
 // Disable GPU rasterization, i.e. rasterize on the CPU only.
 // Overrides the kEnableGpuRasterization and kForceGpuRasterization flags.
 const char kDisableGpuRasterization[]       = "disable-gpu-rasterization";
 
 // When using CPU rasterizing disable low resolution tiling. This uses
 // less power, particularly during animations, but more white may be seen
 // during fast scrolling especially on slower devices.
 const char kDisableLowResTiling[] = "disable-low-res-tiling";
 
@@ skipping 646 matching lines @@
 
 // Type of the current test harness ("browser" or "ui").
 const char kTestType[]                      = "test-type";
 
 // Controls how text selection granularity changes when touch text selection
 // handles are dragged. Should be "character" or "direction". If not specified,
 // the platform default is used.
 const char kTouchTextSelectionStrategy[]    = "touch-selection-strategy";
 
 // Prioritizes the UI's command stream in the GPU process
-extern const char kUIPrioritizeInGpuProcess[] =
-    "ui-prioritize-in-gpu-process";
+const char kUIPrioritizeInGpuProcess[] = "ui-prioritize-in-gpu-process";
 
 // Bypass the media stream infobar by selecting the default device for media
 // streams (e.g. WebRTC). Works with --use-fake-device-for-media-stream.
 const char kUseFakeUIForMediaStream[]     = "use-fake-ui-for-media-stream";
 
 // Enable native GPU memory buffer support when available.
 const char kEnableNativeGpuMemoryBuffers[] = "enable-native-gpu-memory-buffers";
 
 // Texture target for CHROMIUM_image backed content textures.
 const char kContentImageTextureTarget[] = "content-image-texture-target";
@@ skipping 163 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches