Revert of Add drawer with state information

Revert of Add drawer with state information (patchset #8 id:140001 of https://codereview.chromium.org/2004633002/ )

Reason for revert:
Broke Build-Ubuntu-GCC-Arm7-Debug-Android_Vulkan.  See https://uberchromegw.corp.google.com/i/client.skia.compile/builders/Build-Ubuntu-GCC-Arm7-Debug-Android_Vulkan/builds/134/steps/compile_skia%20on%20Ubuntu/logs/stdio

Original issue's description:
> Now we can use drawer to view the state information of the native app, and set its state using the spinner.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2004633002
> 
> Committed: https://skia.googlesource.com/skia/+/4e4e30823fba0047b93a56bfcf05c04ca57e82ec

TBR=djsollen@google.com,jvanverth@google.com,liyuqian@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

[kjlubick, 2016-05-27 13:12:18]

Created Revert of Add drawer with state information

[commit-bot: I haz the power, 2016-05-27 13:12:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2017933002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2017933002/1

[commit-bot: I haz the power, 2016-05-27 13:12:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-05-27 13:12:33]

Failed to apply patch for tools/viewer/Viewer.cpp:
While running git apply --index -3 -p1;
  error: patch failed: tools/viewer/Viewer.cpp:33
  Falling back to three-way merge...
  Applied patch to 'tools/viewer/Viewer.cpp' with conflicts.
  U tools/viewer/Viewer.cpp

Patch:       tools/viewer/Viewer.cpp
Index: tools/viewer/Viewer.cpp
diff --git a/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index
6519a3c8be59007e89ee882c6739638fa61a8291..c4b8b26dc51e3fda5a43a66962f5dba0a397de0d
100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -33,12 +33,6 @@
     Viewer* viewer = reinterpret_cast<Viewer*>(userData);
 
     return viewer->onTouch(owner, state, x, y);
-}
-
-static void on_ui_state_changed_handler(const SkString& stateName, const
SkString& stateValue, void* userData) {
-    Viewer* viewer = reinterpret_cast<Viewer*>(userData);
-
-    return viewer->onUIStateChanged(stateName, stateValue);
 }
 
 DEFINE_bool2(fullscreen, f, true, "Run fullscreen.");
@@ -59,12 +53,6 @@
     " [Vulkan]"
 };
 
-const char* kName = "name";
-const char* kValue = "value";
-const char* kOptions = "options";
-const char* kSlideStateName = "Slide";
-const char* kBackendStateName = "Backend";
-
 Viewer::Viewer(int argc, char** argv, void* platformData)
     : fCurrentMeasurement(0)
     , fDisplayStats(false)
@@ -91,7 +79,6 @@
     fCommands.attach(fWindow);
     fWindow->registerPaintFunc(on_paint_handler, this);
     fWindow->registerTouchFunc(on_touch_handler, this);
-    fWindow->registerUIStateChangedFunc(on_ui_state_changed_handler, this);
 
     // add key-bindings
     fCommands.addCommand('s', "Overlays", "Toggle stats display", [this]() {
@@ -226,10 +213,6 @@
 }
 
 void Viewer::setupCurrentSlide(int previousSlide) {
-    if (fCurrentSlide == previousSlide) {
-        return; // no change; do nothing
-    }
-
     fGesture.reset();
     fDefaultMatrix.reset();
     fDefaultMatrixInv.reset();
@@ -252,7 +235,6 @@
     }
 
     this->updateTitle();
-    this->updateUIState();
     fSlides[fCurrentSlide]->load();
     if (previousSlide >= 0) {
         fSlides[previousSlide]->unload();
@@ -400,49 +382,3 @@
         fWindow->inval();
     }
 }
-
-void Viewer::updateUIState() {
-    Json::Value slideState(Json::objectValue);
-    slideState[kName] = kSlideStateName;
-    slideState[kValue] = fSlides[fCurrentSlide]->getName().c_str();
-    Json::Value allSlideNames(Json::arrayValue);
-    for(auto slide : fSlides) {
-        allSlideNames.append(Json::Value(slide->getName().c_str()));
-    }
-    slideState[kOptions] = allSlideNames;
-
-    // This state is currently a demo for the one without options.
-    // We will be able to change the backend too.
-    Json::Value backendState(Json::objectValue);
-    backendState[kName] = kBackendStateName;
-    backendState[kValue] = fBackendType == sk_app::Window::kVulkan_BackendType
?
-            "Vulkan" : "Other than Vulkan";
-    backendState[kOptions] = Json::Value(Json::arrayValue);
-
-    Json::Value state(Json::arrayValue);
-    state.append(slideState);
-    state.append(backendState);
-
-    fWindow->setUIState(state);
-}
-
-void Viewer::onUIStateChanged(const SkString& stateName, const SkString&
stateValue) {
-    // Currently, we only recognize the Slide state
-    if (stateName.equals(kSlideStateName)) {
-        int previousSlide = fCurrentSlide;
-        fCurrentSlide = 0;
-        for(auto slide : fSlides) {
-            if (slide->getName().equals(stateValue)) {
-                setupCurrentSlide(previousSlide);
-                break;
-            }
-            fCurrentSlide++;
-        }
-        if (fCurrentSlide >= fSlides.count()) {
-            fCurrentSlide = previousSlide;
-            SkDebugf("Slide not found: %s", stateValue.c_str());
-        }
-    } else {
-        SkDebugf("Unknown stateName: %s", stateName.c_str());
-    }
-}