Fix flaky ImageBitmap resize layout tests

ImageBitmap resize layout tests write an extensive amount of debug
information to the console, as requested by Skia team. Apparently
sometimes the test finishes before all the degug info are printed
to the console, causing the tests to be flaky on try bots. This
CL hides the debug info behind a test option, so they can be printed
only if necessary.

Bug: 829953
Change-Id: I32955d2b49074cdf68ab7e59766d91fc560286cf
Reviewed-on: https://chromium-review.googlesource.com/1026200Reviewed-by: Justin Novosad <junov@chromium.org>
Commit-Queue: Mohammad Reza Zakerinasab <zakerinasab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553631}

third_party/WebKit/LayoutTests/fast/webgl/resources/tex-image-and-sub-image-image-bitmap-utils-resize.js

@@ -247,6 +247,7 @@ function DrawResultsOnCanvas(testOptions) {
                 var x = (tileCounter * testOptions.resizeWidth) % width;
                 var y = Math.floor(tileCounter / numTiles) *
                     testOptions.resizeHeight;
+                if (testOptions.printDebugInfoToConsole)
                     PrintTileInfoForDebug(x, y, pixelsBuffer[j].quality,
                         pixelsBuffer[j].premultiply, pixelsBuffer[j].flip);
                 tileCounter++;

third_party/WebKit/LayoutTests/fast/webgl/texImage-imageBitmap-from-blob-resize.html

@@ -15,7 +15,8 @@ canvas.height = 400;
 document.body.appendChild(canvas);
 
 var testOptions = {sourceName: "Blob", sourceIsPremul: true, resizeWidth: 16,
-				   resizeHeight: 16, resultsCanvas: canvas};
+				   resizeHeight: 16, resultsCanvas: canvas,
+				   printDebugInfoToConsole: false};
 prepareWebGLContext(testOptions);
 
 var xhr = new XMLHttpRequest();

third_party/WebKit/LayoutTests/fast/webgl/texImage-imageBitmap-from-canvas-resize.html

@@ -36,7 +36,7 @@ canvas.height = 400;
 document.body.appendChild(canvas);
 var testOptions = {sourceName: "HTMLCanvasElement", imageSource: testCanvas,
                    sourceIsPremul: true, resizeWidth: 16, resizeHeight: 16,
-                   resultsCanvas: canvas};
+                   resultsCanvas: canvas, printDebugInfoToConsole: false};
 
 prepareWebGLContext(testOptions);
 prepareResizedImageBitmapsAndRuntTests(testOptions);

third_party/WebKit/LayoutTests/fast/webgl/texImage-imageBitmap-from-image-resize.html

@@ -17,7 +17,7 @@ document.body.appendChild(canvas);
 
 var testOptions = {sourceName: "HTMLImageElement", imageSource: image,
 				   sourceIsPremul: true, resizeWidth: 16, resizeHeight: 16,
-				   resultsCanvas: canvas};
+				   resultsCanvas: canvas, printDebugInfoToConsole: false};
 prepareWebGLContext(testOptions);
 
 image.onload = function() {

third_party/WebKit/LayoutTests/fast/webgl/texImage-imageBitmap-from-imageData-resize.html

@@ -24,7 +24,8 @@ var imageData = new ImageData(new Uint8ClampedArray(
 var testOptions = {sourceName: "ImageData",
 				   imageSource: imageData, sourceIsPremul: false,
 				   resizeWidth: 16, resizeHeight: 16,
-				   resultsCanvas: canvas};
+				   resultsCanvas: canvas,
+           printDebugInfoToConsole: false};
 prepareWebGLContext(testOptions);
 prepareResizedImageBitmapsAndRuntTests(testOptions);
 </script>
\ No newline at end of file

third_party/WebKit/LayoutTests/fast/webgl/texImage-imageBitmap-from-offscreen-canvas-resize.html

@@ -37,7 +37,7 @@ canvas.height = 400;
 document.body.appendChild(canvas);
 var testOptions = {sourceName: "OffscreenCanvas", imageSource: offscreen,
                    sourceIsPremul: true, resizeWidth: 16, resizeHeight: 16,
-                   resultsCanvas: canvas};
+                   resultsCanvas: canvas, printDebugInfoToConsole: false};
 
 prepareWebGLContext(testOptions);
 prepareResizedImageBitmapsAndRuntTests(testOptions);

third_party/WebKit/LayoutTests/fast/webgl/texImage-imageBitmap-from-video-resize.html

@@ -17,7 +17,7 @@ document.body.appendChild(canvas);
 
 var testOptions = {sourceName: "HTMLVideoElement", imageSource: video,
                    sourceIsPremul: true, resizeWidth: 16, resizeHeight: 16,
-                   resultsCanvas: canvas};
+                   resultsCanvas: canvas, printDebugInfoToConsole: false};
 prepareWebGLContext(testOptions);
 
 video.oncanplaythrough = function() {