Qualify local constant strings with static, and remove unused strings.

Change-Id: Icd317eb1b260e9640473e8a201a204a6e49bc002
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/287916
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index 1166779..ee5dbaf 100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -241,19 +241,17 @@
     }
 };
 
-const char* kName = "name";
-const char* kValue = "value";
-const char* kOptions = "options";
-const char* kSlideStateName = "Slide";
-const char* kBackendStateName = "Backend";
-const char* kMSAAStateName = "MSAA";
-const char* kPathRendererStateName = "Path renderer";
-const char* kSoftkeyStateName = "Softkey";
-const char* kSoftkeyHint = "Please select a softkey";
-const char* kFpsStateName = "FPS";
-const char* kON = "ON";
-const char* kOFF = "OFF";
-const char* kRefreshStateName = "Refresh";
+static const char kName[] = "name";
+static const char kValue[] = "value";
+static const char kOptions[] = "options";
+static const char kSlideStateName[] = "Slide";
+static const char kBackendStateName[] = "Backend";
+static const char kMSAAStateName[] = "MSAA";
+static const char kPathRendererStateName[] = "Path renderer";
+static const char kSoftkeyStateName[] = "Softkey";
+static const char kSoftkeyHint[] = "Please select a softkey";
+static const char kON[] = "ON";
+static const char kRefreshStateName[] = "Refresh";
 
 extern bool gUseSkVMBlitter;
 extern bool gSkVMJITViaDylib;